グラフェンテラヘルツレーザーの創出

2014 Fiscal Year Annual Research Report

• Project/Area Number: 23000008
• Research Institution: Tohoku University
• Principal Investigator: 尾辻 泰一 東北大学, 電気通信研究所, 教授 (40315172)
• Co-Investigator(Kenkyū-buntansha): 末光 眞希 東北大学, 電気通信研究所, 教授 (00134057) ; 佐野 栄一 北海道大学, 量子集積エレクトロニクス研究センター, 教授 (10333650) ; 末光 哲也 東北大学, 電気通信研究所, 准教授 (90447186) ; 佐藤 昭 東北大学, 電気通信研究所, 助教 (70510410) ; マキシム リズイー 会津大学, コンピュータ理工学部, 准教授 (50254082)
• Project Period (FY): 2011-05-31 – 2016-03-31
• Keywords: グラフェン / テラヘルツ / レーザー / 電流注入 / プラズモン / ポラリトン / 誘導放出 / ボトムアップ

Outline of Annual Research Achievements

グラフェンによる光学励起ならびに電流注入型のテラヘルツレーザー実現に向けて以下を実施した。
光学励起グラフェンレーザー : CVDエピタキシャル成長による高品質単層グラフェン(Si基板上に転写 ; 九大・吾郷准教授提供)をITOミラーで挟んだ縦型Fabri-Perot共振器型構造を改良試作し、ピコ秒高強度赤外線レーザーポンピングによるTHz帯放射スペクトルをフーリエ分光計で測定した。その結、室温下で、2～6THzにおいて増幅を伴う自然放出光の観測に成功した。しかし、誘導放出の観測には至っていない。THz帯誘導放出・レーザー発振の観測に向けて継続推進中である。
電流注入型グラフェンレーザー : Si/SiC/G(グラフェン)/Al_2O_3自然酸化膜のグラフェンヘテロ接合構造にデュアルゲートをスロットラインとして機能させる導波路構造に分布帰還型共振器構造を組み込んだレーザー共振器構造のデバイス試作を行った。トップゲート付のトランジスタ構造において, 極めて高いキャリア移動度110,000㎠/(Vs)を実現し、グラフェンレーザー実現に大きく近づいた[国際会議ISCS2015に採択・口頭発表予定]。
表面プラズモンポラリトン励起による巨大利得 : 前年度考案したグラフェン二重層キャパシタを核とし、その外側両面にゲートスタックを配したグラフェンヘテロ構造体を対象として理論解析を進め、印加バイアスで特定されたプラズモンモード周波数をフォトン発光によってアシストする共鳴トンネルのフォトンエネルギーと同調させることによて、表面プラズモンポラリトンの励起を伴う二重共鳴型のレーザー発振動作が従来のデュアルゲート方式に比して2桁以上の高い利得増強作用が得られることを理論的に発見した[JAP 115, 044511(2014).]。
グラフェンと化学的に最も安定でダメージのない材料として認知されているh-BNを原子4層分トンネルバリア層として導入したグラフェン二十層キャパシタを試作し、その電流電圧特性に予想される負性微分抵抗を低温下ながら観測に成功するとともに、我々が理論発見したフォトン発光でアシストする共鳴トンネル現象の観測に成功し、テラヘルツフォトンの自然放出光観測に初めて成功した。電流注入グラフェンレーザーの実現に大きく前進した[国際会議OTST 2015で発表、CLEO2015に採択・口頭発表予定]。
ボトムアップ型グラフェン成長技術 : Si(110)基板上3C-SiC(111)薄膜の配向成長条件を解明し、その特性を活用した高速回転エピ成長法を開発し、グラフェンの欠陥密度40%低減化に成功した[Mat. Sci. Forum, 740-742, 339(2013) ; ibid. 327(2013)]。G/3C-SiC/Si(GOS構造)のSiC/Si界面へのAlN層挿入とSiC表面平坦化により、G/D比を0.85から4.17へと劇的に増大させ、グラフェン高品質化に成功した[J. Phys. D, 47, 094016, 2014]。Si基板上の微細加工により局所的にGOS構造を形成し、面方位によるグラフェンの物性変調を同一基板上において初めて実現した[Scientific Reports, 4. (2014), 5173]。また、成長用基板表面の欠陥密度制御によるグラフェンの位置選択的成長法を新たに確立した。[J. Phys. D, 47, 094016, 2014]

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

光学励起グラフェンによるレーザー実現に関しては、室温下での増幅自然放出光の観測に成功し、誘導放出成功が期待できる地点まで到達している。
電流注入型レーザーの実現では、トランジスタプロセス技術立ち上げに難航したが、昨年度成果の導波路構造実現の見通しとともに, 今年度は室温下でのテラヘルツ帯利得獲得を実現する上で最も重要かつ困難な課題であったグラフェン本来の秀逸なキャリア輸送特性(巨大キャリア移動度)をトランジスタレベルで実現することに成功し、ハードルは超えた。
さらに、電流注入レーザー発振の実現に必須となる, バンド間遷移に伴う反転分布に比して桁違いに高いキャリア注入効率の実現が可能な研究代表者らが理論発見したゲート制御グラフェン二十層のフォトン発光アシスト共鳴トンネル現象によるテラヘルツ自然放出現象の実験観測に成功するとともに, さらに桁違いに高い利得を実現し得るゲート制御グラフェン二十層による表面プラズモンポラリトン励起によるレーザー発振現象を理論発見していることから、提案・発見した物理現象の"デバイスへの実装"が可能なレベルにまで到達している。これは、H24年度の成果であるグラフェン・金属プラズモニックメタマテリアル構造による巨大利得増強作用とならんで、室温テラヘルツレーザー発振成功を可能にする重大なブレークスルーである。
高品質グラフェン成長技術では基板面方位による積層様式の完全制御、ならびに表面平坦化と領域限定による高品質化を実現できている。以上の点を総合的に勘案した。

Strategy for Future Research Activity

本課題最終年度に当たる27年度は、新奇材料グラフェンによる新原理テラヘルツレーザー発振の実現を第一目標として研究を継続するとともに、これまでに明らかにしてきた理論・設計論を学理として体系化し、将来の産業化に向けた礎を構築する。具体的には、以下の課題を実施する。
(連携研究者 : 吹留博一助教・電気通信研究所、高桑雄二教授・多元物質科学研究所、吾郷浩樹准教授・九州大学先導物質化学研究所)
1. 光学励起グラフェンレーザー : グラフェン転写用に高抵抗Si基板を導入し、自由キャリア吸収を抑える、ITOミラーの反射率を向上させ、レーザー共振器のQ値を現状の60程度から1桁以上向上させるなどの改良によって、増幅自然放出から誘導放出・レーザー発振実現へと成功に導く。発振閾値特性の詳細評価のために、クライオスタットによる動作温度依存性評価を併せて実施する。
2. 電流注入型グラフェンレーザー : デュアルゲートDLC-グラフェンFETにSPP励起・伝搬が可能な導波路構造を導入設計する第一案と、回折格子ゲートによるグラフェン金属アレイ型メタマテリアル構造の第二案、さらに、ゲートスタック付グラフェン二重層キャパシタ構造(GS-GDL)とを継続して試作・評価し、レーザー発振実現に挑戦する。特に、GS-GDL構造の作製には、トンネルバリアとしてナノメートルオーダのh-BNをグラフェンと積層化する際の、上層グラフェン・下層グラフェン間の結晶方位整合、およびゲートスタックの積層化が鍵となる。グラフェンおよびh-BNは転写法で積層化し、その前後のゲートスタックには光電子制御CVDによるDLC成膜とPE-CVDによるSiCN成膜をアルタナティブとして挑戦する。
3. ボトムアップ型グラフェン成長技術 : 領域限定による高品質化と基板面方位による積層様式制御を実現した次の課題として、グラフェン高品質化の一層の推進が掲げられ、SiC/Si界面へのAlN層挿入とSiC表面平坦化技術の進化をさらに進め、ラマンピークG/D比を~5から~20への向上を目指す。
4. グラフェンテラヘルツレーザー理論の体系化と設計論の構築 : 本課題で対象とするグラフェンテラヘルツレーザーは、新しいグラフェンの光物性応用として、また、新しいレーザー理論の誕生という意味において、科学的側面から学術的意義は極めて高いと判断できる。同時に、レーザーを実現する上で、グラフェンの特異なバンド構造を活用する新しい電流注入型グラフェンレーザー素子構造の提案、設計論の体系化という工学的側面からの学術的意義も高く、学理の追及に基づく科学技術イノベーションとして極めて高い意義を有するものと判断できる。
5. テラヘルツ帯超高速通信、分光イメージング等のテラヘルツ応用システムへの導入・展開 : 本研究が成功すれば、半導体集積デバイスとして世界初の室温THzレーザー発振が可能となり、100Gbit/s級超高速THz無線通信の実現やその携帯端末化、THzカメラ、瞬時に超大容量メディアのダウンロード・アップロードが可能ないわゆるユビキタスTransfer-Jetサービスなど、将来の安心・安全・ユビキタスな情報通信社会に産業革命をもたらす大きな可能性を秘めている。これらの具体的な応用展開を図っていく。

Research Products

• [Journal Article] High quality graphene formation on 3C-SiC/4H-AlN/Si heterostructure (2015)
  • Author(s): Sai Jiao, Yuya Murakami, Hiroyoki Nagasawa, Hirokazu Fukidome, Isao Makabe, Yasunori Tateno, Takashi Nakabayashi, and Maki Suemitsu
  • Journal Title: Materials Science Forum Volume: 806 Pages: 89-93
  • DOI: 10.4028/www.scientific.net/MSF.806.89
  • Peer Reviewed / Open Access
• [Journal Article] Graphene-channel FETs for photonic frequency double-mixing conversion over the sub-THz band (2015)
  • Author(s): T. Kawasaki, K. Sugawara, A. Dobroiu, T. Eto, Y. Kurita, K. Kojima, Y. Yabe, H. Sugiyama, T. Watanabe, T. Suemitsu, V. Ryzhii, K. Iwatsuki, Y. Fukada, J. Kani, J. Terada, N. Yoshimoto, K. Kawahara, H. Ago, and T. Otsuji
  • Journal Title: Solid State Electron Volume: 103 Pages: 216-221
  • DOI: 10.1016/j.sse.2014.07.009
  • Peer Reviewed
• [Journal Article] Room-temperature zero-bias plasmonic THz detection by asymmetric dual-grating-gate HEMT (2015)
  • Author(s): T. Watanabe, T. Kawasaki, A. Satou, S.A. Boubanga Tombet, T. Suemitsu, G. Ducournau, D. Coquillat, W. Knap, H. Minamide, H. Ito, Y.M. Meziani, V.V. Popov, and T. Otsuji
  • Journal Title: Proc. SPIE Volume: 9362 Pages: 93620F-1-7
  • DOI: 10.1117/12.2079184
  • Peer Reviewed
• [Journal Article] Recent advances in the research toward graphene-based terahertz lasers (2015)
  • Author(s): Taiichi Otsuji, Akira Satou, Takayuki Watanabe, Stephane Albon Boubanga-Tombet, Alexander Dubinov, Vyacheslav V. Popov, Michael Shur, and Victor Ryzhii
  • Journal Title: Proc. SPIE Volume: 9382 Pages: 938219-1-10
  • DOI: 10.1117/12.2079411
  • Peer Reviewed
• [Journal Article] Active guiding of Dirac Plasmons in graphene (2015)
  • Author(s): M.Y. Morozov, A.R. Davoyan, I.M. Moiseenko, A. Satou, T. Otsuji, and V.V. Popov
  • Journal Title: Appl. Phys. Lett. Volume: 106 Pages: 061105-1-5
  • DOI: 10.1063/1.4907644
  • Peer Reviewed
• [Journal Article] Controlled oxygen-doped diamond-like carbon film synthesized by photoemission-assisted plasma (2015)
  • Author(s): S. Takabayashi, M. Yang, T. Eto, H. Hayashi, S. Ogawa, T. Otsuji, and Y. Takakuwa
  • Journal Title: Diamond and Related Materials Volume: 53 Pages: 11-17
  • DOI: 10.1016/j.diamond.2015.01.001
  • Peer Reviewed
• [Journal Article] Terahertz emission in a double-graphene-layer heterostructure (2015)
  • Author(s): S. Boubanga Tombet, D. Yadav, T. Watanabe, V. Ryzhii, and T. Otsuji
  • Journal Title: OTST : Int. Conf. on Optical Terahertz Science and Technology Dig Volume: 1 Pages: S3P1-4
  • Peer Reviewed
• [Journal Article] Geometrical dependence of ultrahigh responsivity and its broadband characteristics of InP-based asymmetric dual-grating-gate high-electron-mobility transistors (2015)
  • Author(s): A. Satou, T. Kawasaki, S. Hatakeyama, S. Boubanga Tombet, T. Suemitsu, G. Ducournau, D. Coquillat, D.V. Fateev, V.V. Popov, Y.M. Meziahi, and T. Otsuii
  • Journal Title: OTST : Int. Conf. on Optical Terahertz Science and Technology Dig Volume: 1 Pages: PS2-9
  • Peer Reviewed
• [Journal Article] Terahertz photocurrents generated in two-dimensional electron systems by non-centrosymmetric plasmon modes (2015)
  • Author(s): V.V. Popov, D.V. Fateev, A. Satou, S.A. Boubanga-Tombet, Y. Kurita, T. Watanabe, and T. Otsuji
  • Journal Title: OTST : Int. Conf. on Optical Terahertz Science and Technology Dig Volume: 1 Pages: PS3-1
  • Peer Reviewed
• [Journal Article] Recent advances in graphene heterostructures toward the creation of terahertz lasers (2015)
  • Author(s): T. Otsuji, S. Boubanga Tombet, and V. Ryzhii
  • Journal Title: Graphene 2015 : 5th Edition of the European Conference in Graphene and 2D Materials, Imaginano Abstracts Book Volume: 1 Pages: 131
  • Peer Reviewed
• [Journal Article] Negative terahertz conductivity in disordered graphene bilayers with population inversion (2015)
  • Author(s): D. Svintsov, T. Otsuji, V. Mitin, M.S. Shur, and V. Ryzhii
  • Journal Title: Appl. Phys. Lett. Volume: 106 Pages: 113501-1-5
  • DOI: 10.1063/1.4915314
  • Peer Reviewed
• [Journal Article] 金属メッシュ付単層グラフェンによるテラヘルツ波放射 (2015)
  • Author(s): 板津太郎, 佐野栄一, 矢部裕平, Victor Ryzhii, 尾辻泰一
  • Journal Title: 信学会総合大会 予稿集 Volume: 1 Pages: C10-12
• [Journal Article] 超高速テラヘルツ無線を支える光電子デバイス技術の動向 (2015)
  • Author(s): 佐藤昭, 尾辻泰一
  • Journal Title: 信学会総合大会 予稿集 Volume: 1 Pages: CI-3-8
• [Journal Article] SiCN鋳型プロセスを用いた傾斜フィールドプレート構造を持つInGaAs系HEMTの作製とその特性 (2015)
  • Author(s): 吉田智洋, 畠山信也, 安川奈那, 尾辻泰一, 末光哲也
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 11a-A21-5
• [Journal Article] 接触抵抗改善によるグラフェンFETの高性能化 (2015)
  • Author(s): 小岩匡, 岡謙吾, 末光哲也, 尾辻泰一, 内野俊
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 11a-P6-41
• [Journal Article] グラフェンのテラヘルツ帯における運動量緩和時間の実験的導出 (2015)
  • Author(s): 若生洋由希, 佐藤昭, ヴィクトールリズィー, 河原憲治, 吾郷浩樹, 河野淳一郎, 尾辻泰一
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 12a-A14-2
• [Journal Article] 非対称二重格子ゲート構造を有するグラフェントランジスタにおけるプラズマ不安定性 (2015)
  • Author(s): 小関勇気, リズィーヴィクトール, 尾辻泰一, ポポフヴィアチェスラフ, 佐藤昭
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 12a-A14-7
• [Journal Article] 非対称二重格子ゲートHEMTによるテラヘルツ波検出の周波数特性 (2015)
  • Author(s): 佐藤昭, Stephane Boubanga Tombet, 渡辺隆之, 川﨑鉄哉, 糟谷文月, 末光哲也, Denis V. Fateev, Vyacheslav V. Popov, 南出泰亜, 伊藤弘昌, Dominique Coquillat, Wojciech Knap, Guillaume Ducournau, Yahya Meziani, 尾辻泰一
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 12p-A14-10
• [Journal Article] グラフェンチャネルFETのサブテラヘルツ帯ミキサ応用 (2015)
  • Author(s): 菅原健太, 川﨑鉄哉, Binti Hussin Mastura, 玉虫元, 末光眞希, 吹留博一, 可児淳一, 寺田純, 桑野茂, 岩月勝美, 末光哲也, 尾辻泰一
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 13a-A14-9
• [Journal Article] InAlN/GaN HEMTsにおける傾斜型フィールドプレートによるドレイン空乏領域長への影響 (2015)
  • Author(s): 安川奈那, 畠山信也, 吉田智洋, 尾辻泰一, 末光哲也
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 13p-P17-7
• [Journal Article] SiNゲートスタックによる高キャリア移動度グラフェンチャネルFET (2015)
  • Author(s): 玉虫元, 菅原健太, Mastura binti Hussin, 末光哲也, 須藤亮太, 吹留博一, 末光眞希, 尾辻泰一
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 14a-D7-2
• [Journal Article] 高品質エピタキシャルグラフェンを用いたGFETの特性評価 (2015)
  • Author(s): 須藤亮太、舘野泰範、吹留博一、末光眞希
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 14a-D7-1
• [Journal Article] Si基板上エピタキシャルグラフェンのNi援用低温形成とリアルタイム/角度分解光電子分光によるグラフェン化機構評価 (2015)
  • Author(s): 長谷川美佳、須藤亮太、菅原健太、三本菅正太、原本直樹、寺岡有殿、吉越章隆、吹留博一、末光眞希
  • Journal Title: 第62回応用物理学会春季学術講演会 予稿集 Volume: 1 Pages: 12p-D7-5
• [Journal Article] Voltage-tunable terahertz and infrared photodetectors based on double-graphene-layer structures (2014)
  • Author(s): V. Ryzhii, T. Otsuji, V. Ya Aleshkin, A.A. Dubinov, M. Ryzhii, V. Mitin, and M.S. Shur
  • Journal Title: Appl. Phys. Lett Volume: 104 Pages: 163505-1-4
  • DOI: 10.1063/1.4873114
  • Peer Reviewed
• [Journal Article] Giant terahertz gain by excitation of surface plasmon polarities inoptically pumped graphene (2014)
  • Author(s): T. Otsuji, T. Watanabe, S. Boubanga Tombet, A. Satou, A.A. Dubinov, V. YaAleshkin, V. Mitin, and V. Ryzhii
  • Journal Title: Proc. SPIE Volume: 9102 Pages: 91020I-1-5
  • DOI: 10.1117/12.2055376
  • Peer Reviewed
• [Journal Article] Double graphene-layer structures for adaptive devices (2014)
  • Author(s): V. Mitin, V. Ryzhii, T. Otsuji, M. Ryzhii, and M. Shur
  • Journal Title: Proc. SPIE Volume: 9083 Pages: 90830A-1-12
  • DOI: 10.1117/12.2050218
  • Peer Reviewed
• [Journal Article] RF characteristics of AlGaN/GaN HEMTs with slant field plates (2014)
  • Author(s): Shinya Hatakeyama, Kengo Kobayashi, Tomohiro Yoshida, Taiichi Otsuji, Tetsuya Suemitsu
  • Journal Title: ISCS : the 41st Int. Symp. On Compound Semiconductors Dig Volume: 1 Pages: Th-C1-6
  • Peer Reviewed
• [Journal Article] Gain enhancement effect of surface plasmon polaritons in optically pumped monolayer graphene (2014)
  • Author(s): T. Kawasaki, T. Watanabe, T. Fukushima, Y. Yabe, S.A. Boubanga Tombet, A. Satou, A.A. Dubinov, V.Y. Aleshkin, V. Mitin, V. Ryzhii, and T. Otsuji
  • Journal Title: OSA Technical Digest (online) (Optical Society of America, 2014) Volume: 1 Pages: SF2F.4
  • DOI: 10.1364/CLEO_SI.2014.SF2F.4
  • Peer Reviewed
• [Journal Article] Graphene plasmonic heterostructures for lasing and detection of terahertz radiation (2014)
  • Author(s): V. Ryzhii, T. Otsuji, V. Ya Aleshkin, A.A. Dubinov, M. Ryzhii, V. Mitin, and M.S. Shur
  • Journal Title: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental&Applied Problems of Terahertz Devices&Technologies Proc Volume: 1 Pages: 8-9
  • Peer Reviewed
• [Journal Article] Recent advances in 2D electronic and plasmonic terahertz devices (2014)
  • Author(s): T. Otsuji
  • Journal Title: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental&Applied Problems of Terahertz Devices&Technologies Proc Volume: 1 Pages: 11-12
  • Peer Reviewed
• [Journal Article] Challenges to create graphene terahertz lasers (2014)
  • Author(s): T. Otsuji, A. Satou, M. Ryzhii, V. Popov, V. Mitin, and V. Ryzhii
  • Journal Title: J. Phys. Conf. Ser. Volume: 486 Pages: 012007-1-3
  • DOI: 10.1088/1742-6596/486/1/012007
  • Peer Reviewed
• [Journal Article] Demodulation of terahertz signals using plasma and mechanical resonances in double graphene layer structures (2014)
  • Author(s): D. Svintsov, V. Leiman, V. Vyurkov, V. Ryzhii, and T. Otsuji
  • Journal Title: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc Volume: 1 Pages: 18-19
  • Peer Reviewed
• [Journal Article] Ultrahigh sensitive sub-terahertz plasmonic detector based on asymmetri ual-grating-gate HEMT (2014)
  • Author(s): A. Satou, Y. Kurita, G. Ducournau, D. Coquillat, K. Kobayashi, S. Boubanga Tombet, Y.M. Meziani, V.V. Popov, W. Knap, T. Suemitsu, and T. Otsuji
  • Journal Title: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc Volume: 1 Pages: 21-23
  • Peer Reviewed
• [Journal Article] Damping mechanism of terahertz plasmons in graphene on heavily-doped substrate (2014)
  • Author(s): Y. Koseki, A. Satou, V. Ryzhii, V. Vyurkov, and T. Otsuji
  • Journal Title: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc Volume: 1 Pages: 48-50
  • Peer Reviewed
• [Journal Article] Plasmonic terahertz monochromatic coherent emission from an asymmetric chirped dual-grating-gate InP-HEMT with highly asymmetric resonant cavities (2014)
  • Author(s): T. Watanabe, A. Satou, T. Suemitsu, W. Knap, V.V. Popov, V. Ryzhii, M. Shur, and T. Otsuji
  • Journal Title: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc Volume: 1 Pages: 39-40
  • Peer Reviewed
• [Journal Article] Terahertz emission and detection in double-graphene-layer structure (2014)
  • Author(s): T. Otsuji, V.Y. Aleshkin, A.A. Dubinov, M. Ryzhii, V. Mitin, M.S Shur, and V. Ryzhii
  • Journal Title: DRC : The 72nd Device Research Conference Dig Volume: 1 Pages: 159-160
  • DOI: 10.1109/DRC.2014.6872346
  • Peer Reviewed
• [Journal Article] Impact of T-gate stem height on parasitic gate delay time in InGaAs-HEMTs (2014)
  • Author(s): T. Yoshida, K. Kobayashi, T. Otsuji, and T. Suemitsu
  • Journal Title: Solid State Electron Volume: 102 Pages: 93-97
  • DOI: 10.1016/j.sse.2014.06.005
  • Peer Reviewed
• [Journal Article] Ultrahigh sensitive sub-terahertz detection by InP-based asymmetric dual-grating-gate high-electron-mobility transistors and their broadband characteristics (2014)
  • Author(s): Y. Kurita, G. Ducournau, D. Coquillat, A. Satou, K. Kobayashi, S.A. Boubanga-Tombet, Y.M. Meziani, V.V. Popov, W. Knap, T. Suemitsu, and T. Otsuji
  • Journal Title: Appl. Phys. Lett Volume: 104 Pages: 251114-1-4
  • DOI: 10.1063/1.4885499
  • Peer Reviewed
• [Journal Article] Current driven detection of terahertz radiation in dual-grating-gate plasmonic detector (2014)
  • Author(s): S.A. Boubanga Tombet, Y. Tanimoto, A. Satou, T. Suemitsu, Y. Wang, H. Minamide, H. Ito, D.V. Fateev, V.V. Popov, and T. Otsuji
  • Journal Title: Appl. Phys. Lett Volume: 104 Pages: 262104-1-4
  • DOI: 10.1063/1.4886763
  • Peer Reviewed
• [Journal Article] Graphene plasmonic heterostructures for terahertz device applications (2014)
  • Author(s): T. Otsuji, A. Satou, S. Boubanga Tombet, V. Ryzhii, V.V. Popov, and M.S. Shur
  • Journal Title: 16th Int. Conf. on Laser Optics 2014 Proc Volume: 1 Pages: Th-RB-36
  • DOI: 10.1109/LO.2014.6886421
  • Peer Reviewed
• [Journal Article] Current collapse suppression in AlGaN/GaN HEMTs by means of slant field plates fabricated by multi-layer SiCN (2014)
  • Author(s): Kengo Kobayashi, Shinya Hatakeyama, Tomohiro Yoshida, Daniel Piedra, Tomás Palacios, Taiichi Otsuji, Tetsuya Suemitsu
  • Journal Title: Solid State Electron Volume: 101 Pages: 63-69
  • DOI: 10.1016/j.sse.2014.06.022
  • Peer Reviewed
• [Journal Article] グラフェンによるテラヘルツ光発生とレーザーへの応用 (2014)
  • Author(s): 尾辻泰一
  • Journal Title: 光学 Volume: 48 Pages: 382-387
  • Peer Reviewed
• [Journal Article] Improved breakdown voltage and RF characteristics in AlGaN/GaN high electron mobility transistors achieved by slant field plates (2014)
  • Author(s): Kengo Kobayashi, Shinya Hatakeyama, Tomohiro Yoshida, Yuhei Yabe, Daniel Piedra, Tomás Palacios, Taiichi Otsuji, Tetsuya Suemitsu
  • Journal Title: Appl. Phys. Express Volume: 7 Pages: 096501-1-4
  • DOI: 10.7567/APEX.7.096501
  • Peer Reviewed
• [Journal Article] Terahertz lasing and detection in double-graphene-layer structures (2014)
  • Author(s): T. Otsuji, V. Ya Aleshkin, A.A. Dubinov, M. Ryzhii, V. Mitin, M.S. Shur, and V. Ryzhii
  • Journal Title: LEC : 2014 Lester Eastman Conference on High Performance Devices Proc Volume: 1 Pages: S7-N2
  • DOI: 10.1109/LEC.2014.6951573
  • Peer Reviewed
• [Journal Article] Impact of drain conductance in InGaAs-HEMTs operated in a class-F amplifier (2014)
  • Author(s): T. Yoshida, M. Oyama, K. Watanabe, Y. Umeda, T. Otsuji, and T. Suemitsu
  • Journal Title: LEC : 2014 Lester Eastman Conference on High Performance Devices Proc Volume: 1 Pages: S3-P4
  • DOI: 10.1109/LEC.2014.6951560
  • Peer Reviewed
• [Journal Article] Carrier-carrier-scattering and negative dynamic conductivity in pumped graphene (2014)
  • Author(s): D. Svintsov, V. Ryzhii, A. Satou, T. Otsuji, and V. Vyurkov
  • Journal Title: Opt. Express Volume: 22 Pages: 19873-19886
  • DOI: 10.1364/OE.22.019873
  • Peer Reviewed
• [Journal Article] Damping mechanism of terahertz plamons in graphene on a heavily-doped substrate (2014)
  • Author(s): Y. Koseki, A. Satou, V. Ryzhii, V. Vyurkov, and T. Otsuji
  • Journal Title: ICPS : 32nd Int. Conf. on the Physics of Semiconductors, Carbon : Nanotube & Graphene II Volume: 1 Pages: 1205-20
  • Peer Reviewed
• [Journal Article] Graphene plasmonic heterostructures for new typse of terahertz lasers (2014)
  • Author(s): T. Otsuji, V. Ryzhii, S. Boubanga Tombet, T. Watanabe, A. Satou, M. Ryzhii, A. Dubinov, V. Ya Aleshkin, V. Popov, V. Mitin, and M.S. Shur
  • Journal Title: Proc. SPIE Volume: 9199 Pages: 91990F-1-10
  • DOI: 10.1117/12.2061510
  • Peer Reviewed
• [Journal Article] Graphene active plasmonics for new types of terahertz laser (2014)
  • Author(s): S. Boubanga Tombet, T. Otsuji, A. Satou, A.A. Dubinov, V.V. Popov, and V. Ryzhii
  • Journal Title: Condensed Matter in Paris Volume: 1 Pages: TU-70
  • Peer Reviewed
• [Journal Article] Contribution of ideality factor, gate leakage current, and loading effect to terahertz detection by asymmetric dual-grating gate HEMTs (2014)
  • Author(s): D. Coquillat, Y. Kurita, K. Kobayashi, N. Dyakonova, F. Teppe, C. Consejo, D. But, T. Otsuji, and W. Knap
  • Journal Title: Condensed Matter in Paris Volume: 1 Pages: TU-71
  • Peer Reviewed
• [Journal Article] Amplification of terahertz radiation by graphene metasurfaces (2014)
  • Author(s): V.V. Popov, T. Otsuji, and V. Ryzhii
  • Journal Title: Metamaterials 2014 : The 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics Proc Volume: 1 Pages: 244-246
  • DOI: 10.1109/MetaMaterials.2014.6948662
  • Peer Reviewed
• [Journal Article] Relationship between the structure and electrical characteristics of diamond-like carbon films (2014)
  • Author(s): Susumu Takabayashi, Meng Yang, Shuichi Ogawa, Hiroyuki Hayashi, Radek Jesko, Taiichi Otsuji, Yuji Takakuwa
  • Journal Title: J. Appl. Phys Volume: 116 Pages: 093507-1-11
  • DOI: 10.1063/1.4894626
  • Peer Reviewed
• [Journal Article] Enhanced terahertz emission from monolayer graphene with metal mesh structure (2014)
  • Author(s): T. Itatsu, E. Sano, Y. Yabe, V. Ryhzii, T. Otsuji
  • Journal Title: International Conference on Diamond and Carbon Materials Proc Volume: 1 Pages: P2.108
  • Peer Reviewed
• [Journal Article] Detection of terahertz and mid-infrared radiations by InP-based asymmetric dual-grating-gate HEMTs (2014)
  • Author(s): D. Coquillat, P. Zagrajek, N. Dyakonova, K. Chrzanowski, J. Marczewski, Y. Kurita, A. Satou, K. Kobayashi, S. Boubanga Tombet, V.V. Popov, T. Suemitsu, T. Otsuji, W. Knap
  • Journal Title: IRMMW-THz : Int. Conf. on Infrared, Millimeter, and Terahertz Waves Dig Volume: 1 Pages: 1-2
  • DOI: 10.1109/IRMMW-THz.2014.6956522
  • Peer Reviewed
• [Journal Article] Graphene vertical hot-electron terahertz detectors (2014)
  • Author(s): V. Ryzhii, A. Satou, T. Otsuji, M. Ryzhii, V. Mitin and M.S. Shur
  • Journal Title: J. Appl. Phys Volume: 116 Pages: 114504-1-9
  • DOI: 10.1063/1.4895738
  • Peer Reviewed
• [Journal Article] Increased terahertz emission from monolayer graphene with field enhancement effect (2014)
  • Author(s): T. Itatsu, E. Sano, Y. Yabe, V. Ryhzii, and T. Otsuji
  • Journal Title: RPGR 2014 : the 6th Int. Conf. on Recent Progress on Graphene Research Proc Volume: 1 Pages: PH-13
  • Peer Reviewed
• [Journal Article] Improving Graphene Field-Effect Transistor Performance by Self-Aligned Source/Drain Process with Aluminum Sacrificial Layer (2014)
  • Author(s): M.B. Hussin, K. Sugawara, T. Suemitsu, and T. Otsuji
  • Journal Title: RPGR 2014 : the 6th Int. Conf. on Recent Progress on Graphene Research Proc Volume: 1 Pages: PH-06
  • Peer Reviewed
• [Journal Article] Concepts of double-graphene-layer terahertz plasmonic devices (2014)
  • Author(s): V. Ryzhii and T. Otsuji
  • Journal Title: GD : 4th International Symposium on Graphene Devices Abst Volume: 1 Pages: A1.06
  • Peer Reviewed
• [Journal Article] Giant Terahertz Gain by Excitation of Surface Plasmon Polaritons in Optically Pumped Graphene (2014)
  • Author(s): T. Otsuji, T. Watanabe, A. Satou, S.A. Boubanga-Tombet, A. Dubinov, V.V. Popov, V. Mitin, V. Ryzhii
  • Journal Title: ISGD : 4th International Symposium on Graphene Devices Abst Volume: 1 Pages: A4.05
  • Peer Reviewed
• [Journal Article] Graphene terahertz electronics and optoelectronics (2014)
  • Author(s): V. Ryzhii, T. Otsuji, M. Ryzhii, V. Mitin, and M.S. Shur
  • Journal Title: ICMNE : Int. Conf. on Micro and Nano-Electronics Volume: 1 Pages: L2-03
  • Peer Reviewed
• [Journal Article] Plasmon-resonant terahertz emitters and detectors and their system applications (2014)
  • Author(s): S. Boubanga Tombet, T. Otsuji, V. Popov, and W. Knap
  • Journal Title: ICMNE : Int. Conf. on Micro-and Nano-Electronics Volume: 1 Pages: L2-04
  • Peer Reviewed
• [Journal Article] Negative dynamic Drude conductivity in pumped graphene (2014)
  • Author(s): D. Svintsov, V. Ryzhii, and T. Otsuji
  • Journal Title: Appl. Phys. Express Volume: 7 Pages: 115101-1-4
  • DOI: 10.7567/APEX.7.115101
  • Peer Reviewed
• [Journal Article] Terahertz plasmonics : good results and great expectations (2014)
  • Author(s): T. Otsuji and M.S. Shur
  • Journal Title: IEEE Microwave Magazine Volume: 15 Pages: 43-50
  • DOI: 10.1109/MMM.2014.2355712
  • Peer Reviewed
• [Journal Article] Graphene nanoelectromechanical resonators for detection of modulated terahertz radiation (2014)
  • Author(s): D. Svintsov, V.G. Leiman, V. Ryzhii, T. Otsuji, and M.S. Shur
  • Journal Title: J. Phys. D Volume: 47 Pages: 505105-1-7
  • DOI: 10.1088/0022-3727/47/50/505105
  • Peer Reviewed
• [Journal Article] テラヘルツ波検出技術の動向 (2014)
  • Author(s): 尾辻泰一
  • Journal Title: 信学誌 Volume: 26 Pages: 931-937
  • Peer Reviewed
• [Journal Article] グラフェンの超高周波光電子デバイスへの応用 (2014)
  • Author(s): 尾辻泰一
  • Journal Title: J. Vaccum Soc. Jpn. Volume: 57 Pages: 444-450
  • DOI: 10.3131/jvsj2.57.444
  • Peer Reviewed
• [Journal Article] Graphene heterostructures for current-injection terahertz lasing (2014)
  • Author(s): T. Otsuji, V. Ryzhii, A. Dubinov, V. Popov, V. Mitin, and M., S. Shur
  • Journal Title: TeraNano-V : The Fifth International Symposium on Terahertz Nanoscience Dig. Volume: 1 Pages: S12-2
  • Peer Reviewed
• [Journal Article] THz detection using a dual-grating-gate plasmonic detector (2014)
  • Author(s): S.A. Boubanga Tombet, A. Satou, V.V. Popov, and T. Otsuji
  • Journal Title: TeraNano-V : The Fifth International Symposium on Terahertz Nanoscience Dig Volume: 1 Pages: S11-4
  • Peer Reviewed
• [Journal Article] Epitaxial graphene formation on 3C-SiC/Si thin films (2014)
  • Author(s): Maki Suemitsu, Sai Jiao, Hirokazu Fukidome, Yasunori Tateno, Isao Makabe, Takashi Nakabayashi
  • Journal Title: Journal of Physics D Volume: 47 Pages: 094016-1-11
  • DOI: 10.1088/0022-3727/47/9/094016
  • Peer Reviewed
• [Journal Article] Microscopically-Tuned Band Structure of Epitaxial Graphene through Interface and Stacking Variations Using Si Substrate Microfabrication (2014)
  • Author(s): Hirokazu Fukidome, Takayuki Ide, Yusuke Kawai, Toshihiro Shinohara, Naoka Nagamura, Koji Horiba, Masato Kotsugi, Takuo Ohkochi, Toyohiko Kinoshita, Hiroshi Kumighashira, Masaharu Oshima, Maki Suemitsu
  • Journal Title: Scientific Reports Volume: 4 Pages: 5173-1-6
  • DOI: 10.1038/srep05173
  • Peer Reviewed
• [Journal Article] Pinpoint operando analysis of the electronic states of a graphene transistor using photoelectron nanospectroscopy (2014)
  • Author(s): Hirokazu Fukidome, Kousuke Nagashio, Naoka Nagamura, Keiichiro Tashima, Kazutoshi Funakubo, Koji Horiba, Maki Suemitsu, Akira Toriumi, Masaharu Oshima
  • Journal Title: Applied Physics Express Volume: 7 Pages: 065101-1-4
  • DOI: 10.7567/APEX.7.065101
  • Peer Reviewed
• [Journal Article] Observing hot carrier distribution in an n-type epitaxial graphene on a SiC substrate (2014)
  • Author(s): T. Someya, F. Fukidome, Y. Ishida, R. Yoshida, T. Iimori, R. Yukawa, K. Akikubo, Sh. Yamamoto, S. Yamamoto, T. Yamamoto, T. Kanai, K. Funakubo, M. Suemitsu, J. Itatani, F. Komori, S. Shin, I. Matsuda
  • Journal Title: Applied Physics Letters Volume: 104 Pages: 161103-1-4
  • DOI: 10.1063/1.4871381
  • Peer Reviewed
• [Journal Article] Silicon Carbide on Silicon (110) : Surface Structure and Mechanisms of Epitaxial Growth (2014)
  • Author(s): S. Sambonsuge, L.N. Nikitina, Yu.Yu. Hervieu, M. Suemitsu, S.N. Filimonov
  • Journal Title: Russian Physics Journal Volume: 56 Pages: 1439-1444
  • DOI: 10.1007/s11182-014-0197-7
  • Peer Reviewed
• [Journal Article] High-Resolution Imaging of Hydrogen-Intercalated Graphene on 4H-SiC(0001) Using Non-Contact Scanning Nonlinear Dielectric Microscopy (2014)
  • Author(s): Kohei Yamasue, H. Fukidome, K. Funakubo, M. Suemitsu, Y. Cho
  • Journal Title: ICN+T 2014 Abstract Book Volume: 1 Pages: 58
  • Peer Reviewed
• [Journal Article] Noncontact scanning nonlinear dielectric microscopy study of graphene on 4H-SiC(0001) and its hydrogen-intercalation (2014)
  • Author(s): Kohei Yamasue, Hirokazu Fukidome, Kazutoshi Funakubo, Maki Suemitsu, Yasuo Cho
  • Journal Title: NC-AFM 2014 Book of Abstracts Volume: 1 Pages: PT26
  • Peer Reviewed
• [Journal Article] Investigation of Hydrogen-Intercalated Graphene on 4H-SiC(0001) by Noncontact Scanning Nonlinear Dielectric Microscopy (2014)
  • Author(s): Kohei Yamasue, Hirokazu Fukidome, Kazutoshi Funakubo, Maki Suemitsu, Yasuo Cho
  • Journal Title: ECOSS30 : the 30th European Conference on Surface Science Book of Abstracts Volume: 1 Pages: Th-B17-565
  • Peer Reviewed
• [Journal Article] Comparative Study on Pristine and Hydrogen-Intercalated Graphene on 4H-SiC(0001) Surface Using Noncontact Scanning Nonlinear Dielectric Microscopy (2014)
  • Author(s): Kohei Yamasue, Hirokazu Fukidome, Kazutoshi Funakubo, Maki Suemitsu, Yasuo Cho
  • Journal Title: MRS Fall Meeting 2014 Abstracts Book Volume: 1 Pages: K6.01
  • Peer Reviewed
• [Journal Article] Controlling Planar Defects in 3C-SiC : Ways to Wake it upDevelop 3C-SiC as a Practical Semiconductor (2014)
  • Author(s): Hiroyuki Nagasawa, Maki Suemitsu
  • Journal Title: ECSCRM2014 : European Conf. on Silicon Carbide and Related Materials Abstracts Book Volume: 1 Pages: PL-2
  • Peer Reviewed
• [Journal Article] Epitaxial Graphene on Silicon Substrates : Tailoring the Properties through Crystal Faces (2014)
  • Author(s): M. Suemitsu
  • Journal Title: 2014 Tsukuba Nanotechnology Symposium (TNS'14), Abstract book Volume: 1 Pages: 17
• [Journal Article] Graphene based Electronic & Photonic Devices, Circuits and Systems (2014)
  • Author(s): M. Suemitsu
  • Journal Title: EXMATEC 2014 Book of Abstracts Volume: 1 Pages: 197-198
• [Journal Article] Heteroepitaxy of 3C-SiC on Si Using GSMBE and Formation of Epitaxial Graphene Thereon (2014)
  • Author(s): M. Suemitsu, S.N. Filimonov
  • Journal Title: Asia-Pacific Symposium on Solid Surfaces Abstracts Book Volume: 1 Pages: H-4
• [Journal Article] MoS2 FETにおける金属-チャネル界面領域での電荷移動観察 (2014)
  • Author(s): 須藤亮太、田島圭一郎、安川奈那、北田祐太、永村直佳、本間格、堀場弘司、尾嶋正治、吹留博一、末光眞希
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 17p-B1-2
• [Journal Article] 微細加工Si基板上GOSグラフェンの電荷移動領域観察 (2014)
  • Author(s): 田島圭一郎、井出隆之、永村直佳、堀場弘司、尾嶋正治、吹留博一、末光眞希
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 18p-B1-8
• [Journal Article] グラフェンとNiの界面反応の微視的「その場」観察 (2014)
  • Author(s): 長谷川美佳、吹留博一、小嗣真人, 大河内拓雄, 木下豊彦、伊藤俊、末光眞希
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 18p-B1-13
• [Journal Article] F級増幅器におけるInGaAs-HEMTゲート寄生遅延時間の影響 (2014)
  • Author(s): 吉田智洋, 小山雅史, 渡邊邦彦, 楳田洋太郎, 尾辻泰一, 末光哲也
  • Journal Title: 第75回応用物理学会秋季学術講演会予稿集 Volume: 1 Pages: 17a-A27-5
• [Journal Article] An Improved Self-Aligned Ohmic-Contact Process for Graphene-Channel Field-Effect Transistors (2014)
  • Author(s): Hussin Mastura, Kenta Sugawara, Tetsuya Suemitsu, Taiichi Otsuji
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 17p-C3-5
• [Journal Article] ダイヤモンドライクカーボン薄膜のラマン解析(II) : 電気特性との関係性 (2014)
  • Author(s): 鷹林将, 林広幸, 楊猛, 小川修一, 尾辻泰一, 高桑雄二
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 18p-A8-13
• [Journal Article] ダイヤモンドライクカーボン薄膜のラマン解析(I) : 関数解析について (2014)
  • Author(s): 鷹林将, 林広幸, 楊猛, 小川修一, 尾辻泰一, 高桑雄二
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 18p-A8-12
• [Journal Article] ダイヤモンドライクカーボン薄膜へのナノ制御ドーピング (2014)
  • Author(s): 鷹林将, 林広幸, 楊猛, 小川修一, 尾辻泰一, 高桑雄二
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 18p-A8-11
• [Journal Article] 傾斜型フィールドプレートを用いたAlGaN/GaN HEMTsのRF特性 (2014)
  • Author(s): 畠山信也, 小林健悟, 吉田智洋, 尾辻泰一, 末光哲也
  • Journal Title: 第75回応用物理学会秋季学術講演会 予稿集 Volume: 1 Pages: 19p-PB2-7
• [Journal Article] グラフェンおよび化合物半導体ヘテロ接合構造による二次元プラズモンを利用したテラヘルツ波の発生と検出 (2014)
  • Author(s): 尾辻泰一
  • Journal Title: 防衛技術協会 光波・ミリ波センシング研究部会第7回報告会シンポジウム発表資料 Volume: 1 Pages: 1-30
• [Journal Article] InGaAsチャネルHEMT及びグラフェンチャネルFETを用いたミリ波帯フォトミキシング (2014)
  • Author(s): 川崎鉄哉, 吉田智洋, 菅原健太, Adrian Dobroiu, 渡辺隆之, 杉山弘樹, 若生洋由希, 可児淳一, 寺田純, 桑野茂, 吾郷浩樹, 河原憲次, 岩月勝美, 末光哲也, 尾辻泰一
  • Journal Title: 信学技報 Volume: ED2014 Pages: 9-13
• [Journal Article] 金属メッシュ付き単層グラフェンからの増幅されたテラヘルツ波放射 (2014)
  • Author(s): 板津太郎, 佐野栄一, 矢部裕平, Victor Ryhzii, 尾辻泰一
  • Journal Title: 信学技報 Volume: ED-2014 Pages: 91-96
• [Journal Article] 非対称二重格子ゲート高電子移動度トランジスタを用いたプラズモニックテラヘルツ検出の広帯域特性 (2014)
  • Author(s): 佐藤昭, ステファンボーバンガトムベット, 渡辺隆之, 川﨑鉄哉, デニスファティエフ, ヴャチェスラフポポフ, 南出泰亜, 伊藤弘昌, ドミニクコキラ, ヴォイチェッククナップ, ギロームドュコーナ, 尾辻泰一
  • Journal Title: 信学技報 Volume: ED-2014 Pages: 69-74
• [Presentation] SiNゲートスタックによる高キャリア移動度グラフェンチャネルFET (2015)
  • Author(s): 玉虫元
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-14
• [Presentation] 高品質エピタキシャルグラフェンを用いたGFETの特性評価 (2015)
  • Author(s): 須藤亮太
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-14
• [Presentation] グラフェンチャネルFETのサブテラヘルツ帯ミキサ応用 (2015)
  • Author(s): 菅原健太
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-13
• [Presentation] InAlN/GaN HEMTsにおける傾斜型フィールドプレートによるドレイン空乏領域長への影響 (2015)
  • Author(s): 安川奈那
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-13
• [Presentation] Recent advances in graphene heterostructures toward the creation of terahertz lasers (2015)
  • Author(s): 尾辻泰一
  • Organizer: Graphene 2015 : 5th Edition of the European Conference in Graphene and 2D Materials
  • Place of Presentation: Bilbao, Spain
  • Year and Date: 2015-03-13
  • Invited
• [Presentation] グラフェンのテラヘルツ帯における運動量緩和時間の実験的導出 (2015)
  • Author(s): 若生洋由希
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-12
• [Presentation] 非対称二重格子ゲート構造を有するグラフェントランジスタにおけるプラズマ不安定性 (2015)
  • Author(s): 小関勇気
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-12
• [Presentation] 非対称二重格子ゲートHEMTによるテラヘルツ波検出の周波数特性 (2015)
  • Author(s): 佐藤昭
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-12
• [Presentation] Si基板上エピタキシャルグラフェンのNi援用低温形成とリアルタイム/角度分解光電子分光によるグラフェン化機構評価 (2015)
  • Author(s): 長谷川美佳
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 平塚, 日本
  • Year and Date: 2015-03-12
• [Presentation] Terahertz photocurrents generated in two-dimensional electron systems by non-centrosymmetric plasmon modes (2015)
  • Author(s): Vyacheslav V. Popov
  • Organizer: OTST : Int. Conf. on Optical Terahertz Science and Technology
  • Place of Presentation: San Diego, CA, USA
  • Year and Date: 2015-03-11
• [Presentation] SiCN鋳型プロセスを用いた傾斜フィールドプレート構造を持つInGaAs系HEMTの作製とその特性 (2015)
  • Author(s): 吉田智洋
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 神奈川, 日本
  • Year and Date: 2015-03-11
• [Presentation] 接触抵抗改善によるグラフェンFETの高性能化 (2015)
  • Author(s): 小岩匡
  • Organizer: 第62回応用物理学会春季学術講演会
  • Place of Presentation: 神奈川, 日本
  • Year and Date: 2015-03-11
• [Presentation] Terahertz emission in a double-graphene-layer heterostructure (2015)
  • Author(s): Stephane Boubanba-Tombet
  • Organizer: OTST : Int. Conf. on Optical Terahertz Science and Technology
  • Place of Presentation: サンディエゴ
  • Year and Date: 2015-03-10
• [Presentation] Geometrical dependence of ultrahigh responsivity and its broadband characteristics of InP-based asymmetric dual-grating-gate high-electron-mobility transistors (2015)
  • Author(s): 佐藤昭
  • Organizer: OTST : Int. Conf. on Optical Terahertz Science and Technology
  • Place of Presentation: San Diego, CA, USA
  • Year and Date: 2015-03-10
• [Presentation] 超高速テラヘルツ無線を支える光電子デバイス技術の動向 (2015)
  • Author(s): 佐藤昭
  • Organizer: 信学会総合大会
  • Place of Presentation: 草津, 日本
  • Year and Date: 2015-03-10
  • Invited
• [Presentation] 金属メッシュ付単層グラフェンによるテラヘルツ波放射 (2015)
  • Author(s): 板津太郎
  • Organizer: 信学会総合大会
  • Place of Presentation: 草津, 日本
  • Year and Date: 2015-03-10
• [Presentation] Room-temperature zero-bias plasmonic THz detection by asymmetric dual-grating-gate HEMT (2015)
  • Author(s): 渡辺隆之
  • Organizer: SPIE Photonics West
  • Place of Presentation: San Francisco, CA, USA
  • Year and Date: 2015-02-11
• [Presentation] Recent advances in the research toward graphene-based terahertz lasers (2015)
  • Author(s): 尾辻泰一
  • Organizer: SPIE Photonics West
  • Place of Presentation: San Francisco, CA, USA
  • Year and Date: 2015-02-11
  • Invited
• [Presentation] 金属メッシュ付き単層グラフェンからの増幅されたテラヘルツ波放射 (2014)
  • Author(s): 板津太郎
  • Organizer: 信学会電子デバイス研究会
  • Place of Presentation: 仙台, 日本
  • Year and Date: 2014-12-23
• [Presentation] 非対称二重格子ゲート高電子移動度トランジスタを用いたプラズモニックテラヘルツ検出の広帯域特性 (2014)
  • Author(s): 佐藤昭
  • Organizer: 信学会電子デバイス研究会
  • Place of Presentation: 仙台, 日本
  • Year and Date: 2014-12-23
• [Presentation] InGaAsチャネルHEMT及びグラフェンチャネルFETを用いたミリ波帯フォトミキシング (2014)
  • Author(s): 川崎鉄哉
  • Organizer: 信学会電子デバイス研究会
  • Place of Presentation: 仙台, 日本
  • Year and Date: 2014-12-22
• [Presentation] Graphene heterostructures for current-injection terahertz lasing (2014)
  • Author(s): 尾辻泰一
  • Organizer: TeraNano-V : The Fifth International Symposium on Terahertz Nanoscience
  • Place of Presentation: Martinique, Fort de France
  • Year and Date: 2014-12-04
  • Invited
• [Presentation] THz detection using a dual-grating-gate plasmonic detector (2014)
  • Author(s): Stephane Boubanba-Tombet
  • Organizer: TeraNano-V : The Fifth International Symposium on Terahertz Nanoscience
  • Place of Presentation: Martinique, Fort de France
  • Year and Date: 2014-12-04
• [Presentation] Comparative Study on Pristine and Hydrogen-Intercalated Graphene on 4H-SiC(0001) Surface Using Noncontact Scanning Nonlinear Dielectric Microscopy (2014)
  • Author(s): Kohei Yamasue
  • Organizer: MRS Fall Meeting 2014
  • Place of Presentation: Boston, USA
  • Year and Date: 2014-12-02
• [Presentation] グラフェンおよび化合物半導体ヘテロ接合構造による二次元プラズモンを利用したテラヘルツ波の発生と検出 (2014)
  • Author(s): 尾辻泰一
  • Organizer: 防衛技術協会 光波・ミリ波センシング研究部会シンポジウム
  • Place of Presentation: 東京, 日本
  • Year and Date: 2014-11-28
  • Invited
• [Presentation] Recent advances in the research toward graphenebased terahertz lasers (2014)
  • Author(s): 尾辻泰一
  • Organizer: Indo-Japan Program on "Graphene and Related Materials," JNCASR
  • Place of Presentation: Bangalore, India
  • Year and Date: 2014-11-05
  • Invited
• [Presentation] Growth of epitaxial graphene on SiC and its application to FET (2014)
  • Author(s): Maki Suemitsu
  • Organizer: 2nd Malaysia Graphene and Carbon Nanotube Workshop (MGCW 2014)
  • Place of Presentation: Kuala Lumpur, Malaysia
  • Year and Date: 2014-10-20
• [Presentation] グラフェンのディスプレイ応用の可能性 (2014)
  • Author(s): 末光眞希
  • Organizer: CEATEC JAPAN 2014/電子ディスプレイ研究専門委員会(EID)
  • Place of Presentation: 幕張、千葉, 日本
  • Year and Date: 2014-10-09
  • Invited
• [Presentation] Graphene terahertz electronics and optoelectronics (2014)
  • Author(s): Victor Ryzhii
  • Organizer: ICMNE : Int. Conf. on Micro and Nano-Electronics
  • Place of Presentation: Zvenigorod, Russia
  • Year and Date: 2014-10-08
  • Invited
• [Presentation] Plasmon-resonant terahertz emitters and detectors and their system applications (2014)
  • Author(s): Stephane Boubanga-Tombet
  • Organizer: ICMNE : Int. Conf. on Micro and Nano-Electronics
  • Place of Presentation: Zvenigorod, Russia
  • Year and Date: 2014-10-08
  • Invited
• [Presentation] グラフェンを利用したプラズモニックテラヘルツデバイス技術の研究最前線 (2014)
  • Author(s): 尾辻泰一
  • Organizer: IEEE Electron Device Society関西チャプター講演会・DL講演会
  • Place of Presentation: 京都, 日本
  • Year and Date: 2014-10-03
  • Invited
• [Presentation] Heteroepitaxy of 3C-SiC on Si Using GSMBE and Formation of Epitaxial Graphene Thereon (2014)
  • Author(s): Maki Suemitsu
  • Organizer: Asia-Pacific Symposium on Solid Surfaces
  • Place of Presentation: Vladivostok, Russia
  • Year and Date: 2014-09-30
  • Invited
• [Presentation] Giant Terahertz Gain by Excitation of Surface Plasmon Polaritons in Optically Pumped Graphene (2014)
  • Author(s): Taiichi Otsuji
  • Organizer: ISGD : 4th International Symposium on Graphene Devices
  • Place of Presentation: Bellevue, WA, USA
  • Year and Date: 2014-09-25
  • Invited
• [Presentation] Increased terahertz emission from monolayer graphene with field enhancement effect (2014)
  • Author(s): Taro Itatsu
  • Organizer: RPGR 2014 : the 6th Int. Conf. on Recent Progress on Graphene Research
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2014-09-24
• [Presentation] Improving Graphene Field-Effect Transistor Performance by Self-Aligned Source/Drain Process with Aluminum Sacrificial Layer (2014)
  • Author(s): Mastura B. Hussin
  • Organizer: RPGR 2014 : the 6th Int. Conf. on Recent Progress on Graphene Research
  • Place of Presentation: Taipei, Taiwan
  • Year and Date: 2014-09-24
• [Presentation] Controlling Planar Defects in 3C-SiC : Ways to Wake it upDevelop 3C-SiC as a Practical Semiconductor (2014)
  • Author(s): Hiroyuki Nagasawa
  • Organizer: ECSCRM2014 : European Conf. on Silicon Carbide and Related Materials (Key Note Talk)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-09-22
  • Invited
• [Presentation] Concepts of double-graphene-layer terahertz plasmonic devices (2014)
  • Author(s): Victor Ryzhii
  • Organizer: ISGD : 4th International Symposium on Graphene Devices
  • Place of Presentation: Bellevue, WA, USA
  • Year and Date: 2014-09-22
  • Invited
• [Presentation] 傾斜型フィールドプレートを用いたAlGaN/GaN HEMTsのRF特性 (2014)
  • Author(s): 畠山信也
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-09-19
• [Presentation] ダイヤモンドライクカーボン薄膜のラマン解析(II) : 電気特性との関係性 (2014)
  • Author(s): 鷹林将
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-09-18
• [Presentation] ダイヤモンドライクカーボン薄膜のラマン解析(I) : 関数解析について (2014)
  • Author(s): 鷹林将
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-09-18
• [Presentation] ダイヤモンドライクカーボン薄膜へのナノ制御ドーピング (2014)
  • Author(s): 鷹林将
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-09-18
• [Presentation] 微細加工Si基板上GOSグラフェンの電荷移動領域観察 (2014)
  • Author(s): 田島圭一郎
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 札幌, 日本
  • Year and Date: 2014-09-18
• [Presentation] グラフェンとNiの界面反応の微視的「その場」観察 (2014)
  • Author(s): 長谷川美佳
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 札幌, 日本
  • Year and Date: 2014-09-18
• [Presentation] Detection of terahertz and mid-infrared radiations by InP-based asymmetric dual-grating-gate HEMTs (2014)
  • Author(s): Dominique Coquillat
  • Organizer: IRMMW-THz : Int. Conf. on Infrared, Millimeter, and Terahertz Waves Dig
  • Place of Presentation: Tucson, AZ, USA
  • Year and Date: 2014-09-17
• [Presentation] F級増幅器におけるInGaAs-HEMTゲート寄生遅延時間の影響 (2014)
  • Author(s): 吉田智洋
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-09-17
• [Presentation] An Improved Self-Aligned Ohmic-Contact Process for Graphene-Channel Field-Effect Transistors (2014)
  • Author(s): Mastura B. Hussin
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2014-09-17
• [Presentation] MoS2 FETにおける金属-チャネル界面領域での電荷移動観察 (2014)
  • Author(s): 須藤亮太
  • Organizer: 第75回応用物理学会秋季学術講演会
  • Place of Presentation: 札幌, 日本
  • Year and Date: 2014-09-17
• [Presentation] Enhanced terahertz emission from monolayer graphene with metal mesh structure (2014)
  • Author(s): Taro Itatsu
  • Organizer: International Conference on Diamond and Carbon Materials
  • Place of Presentation: Madrid, Spain
  • Year and Date: 2014-09-10
• [Presentation] Investigation of Hydrogen-Intercalated Graphene on 4H-SiC(0001)by Noncontact Scanning Nonlinear Dielectric Microscopy (2014)
  • Author(s): Kohei Yamasue
  • Organizer: ECOSS30 : the 30th European Conference on Surface Science
  • Place of Presentation: Antalya, Turky
  • Year and Date: 2014-09-04
• [Presentation] What is 'Killer Defect' in 3C-SiC (2014)
  • Author(s): 長澤弘幸
  • Organizer: IUMRS-ICA : the 15th International Union of Materials Research Societies, International Conference in Asia
  • Place of Presentation: 福岡, 日本
  • Year and Date: 2014-08-29
• [Presentation] Amplification of terahertz radiation by graphene metasurfaces (2014)
  • Author(s): Vyacheslav V. Popov
  • Organizer: Metamaterials 2014 : The 8th International Congresson Advanced Electromagnetic Materials in Microwaves and Optics Proc
  • Place of Presentation: Copenhagen, Denmark
  • Year and Date: 2014-08-27
• [Presentation] Graphene active plasmonics for new types of terahertz laser (2014)
  • Author(s): Stephane Boubanga-Tombet
  • Organizer: Condensed Matters in Paris
  • Place of Presentation: Paris, France
  • Year and Date: 2014-08-25
• [Presentation] Contribution of ideality factor, gate leakage current, and loading effect to terahertz detection by asymmetric dual-grating gate HEMTs (2014)
  • Author(s): Dominique Coquillat
  • Organizer: Condensed Matters in Paris
  • Place of Presentation: Paris, France
  • Year and Date: 2014-08-25
• [Presentation] Graphene plasmonic heterostructures for new typse of terahertz lasers (2014)
  • Author(s): 尾辻泰一
  • Organizer: SPIE Optics + Photonics 2014, Conf. 9199, Terahertz Emission, Detection and Applications V
  • Place of Presentation: San Diego, CA, USA
  • Year and Date: 2014-08-17
  • Invited
• [Presentation] Damping mechanism of terahertz plamons in graphene on a heavily-doped substrate (2014)
  • Author(s): 小関勇気
  • Organizer: ICPS : 32nd Int. Conf. on the Physics of Semiconductors, Carbon : Nanotube & Graphene II
  • Place of Presentation: Austin, TX, USA
  • Year and Date: 2014-08-13
• [Presentation] Terahertz lasing and detection in double-graphene-layer structures (2014)
  • Author(s): 尾辻泰一
  • Organizer: LEC : 2014 Lester Eastman Conference on High Performance Devices Proc
  • Place of Presentation: Ithaca, NY, USA
  • Year and Date: 2014-08-07
• [Presentation] Noncontact scanning nonlinear dielectric microscopy study of graphene on 4H-SiC(0001) and its hydrogen-intercalation (2014)
  • Author(s): Kohei Yamasue
  • Organizer: NC-AFM 2014
  • Place of Presentation: つくば, 日本
  • Year and Date: 2014-08-05
• [Presentation] Impact of drain conductance in InGaAs-HEMTs operated in a class-F amplifier (2014)
  • Author(s): 吉田智洋
  • Organizer: LEC : 2014 Lester Eastman Conference on High Performance Devices Proc
  • Place of Presentation: Ithaca, NY, USA
  • Year and Date: 2014-08-05
• [Presentation] Epitaxial Graphene on Silicon Substrates : Tailoring the Properties through Crystal Faces (2014)
  • Author(s): 末光眞希
  • Organizer: 2014 Tsukuba Nanotechnology Symposium (TNS'14)
  • Place of Presentation: つくば, 日本
  • Year and Date: 2014-07-26
  • Invited
• [Presentation] High-Resolution Imaging of Hydrogen-Intercalated Graphene on 4H-SiC(0001)Using Non-Contact Scanning Nonlinear Dielectric Microscopy (2014)
  • Author(s): Kohei Yamasue
  • Organizer: ICN+T 2014
  • Place of Presentation: Colorado, USA
  • Year and Date: 2014-07-21
• [Presentation] グラフェン・オン・シリコンのテラヘルツデバイス応用 (2014)
  • Author(s): 尾辻泰一
  • Organizer: 学振将来加工技術第136委員会第3回研究会
  • Place of Presentation: 東京, 日本
  • Year and Date: 2014-07-18
  • Invited
• [Presentation] シリコン基板上3C-SiCのガスソースMBE成長とグラフェン・オン・シリコン技術 (2014)
  • Author(s): 末光眞希
  • Organizer: 第11回Cat-CVD研究会
  • Place of Presentation: 仙台, 日本
  • Year and Date: 2014-07-11
  • Invited
• [Presentation] Graphene plasmonic heterostructures for terahertz device applications (2014)
  • Author(s): 尾辻泰一
  • Organizer: 16th Int. Conf. on Laser Optics 2014
  • Place of Presentation: St. Petersburg, Russia
  • Year and Date: 2014-07-03
  • Invited
• [Presentation] Terahertz emission and detection in double-graphene-layer structure (2014)
  • Author(s): 尾辻泰一
  • Organizer: DRC : The 72nd Device Research Conference Dig
  • Place of Presentation: Santa Barbara, CA, USA
  • Year and Date: 2014-06-23
• [Presentation] Ultrahigh sensitive sub-terahertz plasmonic detector based on asymmetri ual-grating-gate HEMT (2014)
  • Author(s): 佐藤昭
  • Organizer: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc
  • Place of Presentation: Buffalo, NY, USA
  • Year and Date: 2014-06-20
  • Invited
• [Presentation] Damping mechanism of terahertz plasmons in graphene on heavily-doped substrate (2014)
  • Author(s): 小関勇気
  • Organizer: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc
  • Place of Presentation: Buffalo, NY, USA
  • Year and Date: 2014-06-20
• [Presentation] Plasmonic terahertz monochromatic coherent emission from an asymmetric chirped dual-grating-gate InP-HEMT with highly asymmetric resonant cavities (2014)
  • Author(s): 渡辺隆之
  • Organizer: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc
  • Place of Presentation: Buffalo, NY, USA
  • Year and Date: 2014-06-20
  • Invited
• [Presentation] Graphene based Electronic & Photonic Devices, Circuits and Systems (2014)
  • Author(s): 末光眞希
  • Organizer: EXMATEC 2014
  • Place of Presentation: Delphi, Greece
  • Year and Date: 2014-06-19
  • Invited
• [Presentation] Graphene plasmonic heterostructures for lasing and detection of terahertz radiation (2014)
  • Author(s): Victor Ryzhii
  • Organizer: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc
  • Place of Presentation: Buffalo, NY, USA
  • Year and Date: 2014-06-18
  • Invited
• [Presentation] Recent advances in 2D electronic and plasmonic terahertz devices (2014)
  • Author(s): 尾辻泰一
  • Organizer: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc
  • Place of Presentation: Buffalo, NY, USA
  • Year and Date: 2014-06-18
  • Invited
• [Presentation] Demodulation of terahertz signals using plasma and mechanical resonances in double graphene layer structures (2014)
  • Author(s): Dmitry Svintsov
  • Organizer: RJUS TeraTech-2014 : The 3rd Russia-Japan-USA Symp. on Fundamental & Applied Problems of Terahertz Devices & Technologies Proc
  • Place of Presentation: Buffalo, NY, USA
  • Year and Date: 2014-06-18
  • Invited
• [Presentation] Gain enhancement effect of surface plasmon polaritons in optically pumped monolayer graphene (2014)
  • Author(s): 川崎鉄哉
  • Organizer: CLEO : 2014, OSA Technical Digest (online) (Optical Society of America, 2014)
  • Place of Presentation: Sa Jose, CA, USA
  • Year and Date: 2014-06-13
• [Presentation] RF characteristics of AlGaN/GaN HEMTs with slant field plates (2014)
  • Author(s): 畠山信也
  • Organizer: ISCS : the 41st Int. Symp. On Compound Semiconductors
  • Place of Presentation: Montpellier, France
  • Year and Date: 2014-05-15
• [Presentation] Giant terahertz gain by excitation of surface plasmon polarities in optically pumped graphene (2014)
  • Author(s): 尾辻泰一
  • Organizer: SPIE DSS : 2014 Sensing Technology + Applications, Conference ST105 on Terahertz Physics, Devices, and Systems VIII : Advanced Applications in Industry and Defense
  • Place of Presentation: Baltimore, MD, USA
  • Year and Date: 2014-05-08
  • Invited
• [Presentation] Double graphene-layer structures for adaptive devices (2014)
  • Author(s): Vladimir Mitin
  • Organizer: Micro- and Nanotechnology Sensors, Systems, and Applications VI
  • Place of Presentation: Baltimore, MD, USA
  • Year and Date: 2014-05-08
  • Invited
• [Presentation] 半導体プラズモニック集積デバイス技術とそのテラヘルツセンシング応用 (2014)
  • Author(s): 尾辻泰一
  • Organizer: IEEE Sendai Section主催 新Fellow記念講演会
  • Place of Presentation: 仙台
  • Year and Date: 2014-04-16
  • Invited
• [Book] Frontiers of Graphene and Carbon Nanotubes, edited by K. Matsumoto (Chapt. 8, Graphene terahertz devices, pp. 105-122.) (2015)
  • Author(s): T. Otsuji
  • Total Pages: 289(105-122)
  • Publisher: Springer, Tokyo, Japan
• [Remarks]
  • URL: http://www.otsuji.riec.tohoku.ac.jp