グラフェンディラックフェルミオンのプラズモン異常不安定性とそのテラヘルツ機能応用

2021 Fiscal Year Annual Research Report

• Project/Area Number: 20K20349
• 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• Co-Investigator(Kenkyū-buntansha): 岩月 勝美 東北大学, 電気通信研究機構, 特任教授 (00590522) [Withdrawn] ; 佐藤 昭 東北大学, 電気通信研究所, 准教授 (70510410) ; 渡辺 隆之 東北大学, 電気通信研究所, 助教 (80771807)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: グラフェン / ディラックプラズモン / 不安定性 / テラヘルツ

Outline of Annual Research Achievements

１．非対称二重回折格子ゲート型グラフェントランジスタを研究代表者らが独自に開発してきたエピタキシャルグラフェン製膜，グラフェン・窒化ホウ素剥離転写，グラフェンチャネルゲートスタック等のプロセス技術を駆使し，素子の設計・試作を実施した[前年度からの継続課題，担当：尾辻泰一，渡辺隆之（研究分担者），吹留博一（研究協力者）]．
２．デバイスモデリングに関しては，第一に，グラフェン電子正孔のクーロン相互作用に伴う多体効果をキャリア自己エネルギーとして記述し，ランダム位相近似およびGWA法により線形バンド分散の崩れ（ブロードニングと非線形性）を伴うグラフェンプラズモンを2.5次元に次元拡張して定式化し，ポアッソン方程式と連立して自己無撞着に数値解析するシミュレータを完成した[前年度からの継続発展課題，担当：尾辻泰一，佐藤昭（研究分担者）]．第二に，「プラズモン異常不安定性」と命名した従来理論では説明のつかない実験結果を説明し得る可能性のあるグラフェンディラックプラズモンに特有の新規な不安定性が生じ得ることを理論的に発見し，「クーロンドラッグ不安定性」と命名した．
３．研究代表者所有のテラヘルツ時間分解分光計測装置を用いて実証に成功したテラヘルツ帯コヒーレント増幅に続き，フーリエ変換赤外分光光度計を用いて試作素子におけるテラヘルツ帯自励発振の観測に挑み，その兆候を捉えることに成功した[前年度からの継続課題，担当：尾辻泰一，渡辺隆之（研究分担者）]．
４．グラフェンプラズモン異常不安定性を新原理として導入したテラヘルツ増幅素子および光・テラヘルツ波周波数変換・増幅素子を設計試作評価し，従来技術に対する量子効率改善効果を評価した結果，電流駆動による不安定性発現により，光－テラヘルツ波変換利得ならびにテラヘルツ波検出感度を１桁以上向上できることを実証した[前年度からの継続課題，担当：尾辻泰一]．

Research Products

• [Int'l Joint Research] ニューヨーク州立大学バッファロー校/レンセラー工科大学(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: ニューヨーク州立大学バッファロー校/レンセラー工科大学
• [Int'l Joint Research] マイクロ構造物理学研究所/コテルニコフ無線電子工学研究所サラトフ支所/バウマンモスクワ州立工科大学(ロシア連邦)
  • Country Name: RUSSIA FEDERATION
  • Counterpart Institution: マイクロ構造物理学研究所/コテルニコフ無線電子工学研究所サラトフ支所/バウマンモスクワ州立工科大学
• [Int'l Joint Research] モンペリエ大学/国立科学センター(フランス)
  • Country Name: FRANCE
  • Counterpart Institution: モンペリエ大学/国立科学センター
• [Int'l Joint Research] ワルシャワ大学/国立高圧物理学研究所(ポーランド)
  • Country Name: POLAND
  • Counterpart Institution: ワルシャワ大学/国立高圧物理学研究所
• [Int'l Joint Research] サラマンカ大学(スペイン)
  • Country Name: SPAIN
  • Counterpart Institution: サラマンカ大学
• [Journal Article] Ballistic Injection Terahertz Plasma Instability in Graphene n + -i-n-n + Field-Effect Transistors and Lateral Diodes (2022)
  • Author(s): V. Ryzhii, M. Ryzhii, A. Satou, V. Mitin, M.S. Shur, and T. Otsuji
  • Journal Title: Physica Status Solidi A: Appl. and Mat. Sci. (Top Cover Art) Volume: 219 Pages: 2100694-1-8
  • DOI: 10.1002/pssa.202100694
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Graphene-based plasmonic metamaterial for terahertz laser transistors (2022)
  • Author(s): T. Otsuji, S.A. Boubanga-Tombet, A. Satou, D. Yadav, H. Fukidome, T. Watanabe, T. Suemitsu, A.A. Dubinov, V.V. Popov, W. Knap, V. Kachorovskii, K. Narahara, M. Ryzhii, V. Mitin, M.S. Shur, and V. Ryzhii
  • Journal Title: Nanophoton. (invited, review) Volume: 11 Pages: 1677-1696
  • DOI: 10.1515/nanoph-2021-0651
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] テラヘルツ通信応用に向けたグラフェンレーザートランジスタ技術 (2022)
  • Author(s): 尾辻泰一
  • Journal Title: 日本赤外線学会学会誌 (invited) Volume: 31 Pages: 68-75
  • Peer Reviewed
• [Journal Article] Graphene-based plasma-wave devices for terahertz applications (2022)
  • Author(s): T. Otsuji, V. Ryzhii, and M. Shur
  • Journal Title: Proc. SPIE (invited) Volume: 11975 Pages: 1197503-1-8
  • DOI: 10.1117/12.2604818
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Coulomb drag and plasmonic effects in graphene field-effect transistors enable resonant terahertz detection (2022)
  • Author(s): M. Ryzhii, V. Ryzhii, T. Otsuji, V. Mitin, and M.S. Shur
  • Journal Title: Appl. Phys. Lett. Volume: 120 Pages: 111102-1-6
  • DOI: 10.1063/5.0087678
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] S-shaped current-voltage characteristics of n+-i-n-n+ graphene field-effect transistors due the Coulomb drag of quasi-equilibrium electrons by ballistic electrons (2021)
  • Author(s): V. Ryzhii, M. Ryzhii, V. Mitin, M.S. Shur, and T. Otsuji
  • Journal Title: Phys. Rev. Appl. Volume: 16 Pages: 014001-1-12
  • DOI: 10.1103/PhysRevApplied.16.014001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Coulomb electron drag mechanism of terahertz plasma instability in n+-i-n-n+ graphene FETs with ballistic injection (2021)
  • Author(s): V. Ryzhii, M. Ryzhii, V. Mitin, M.S. Shur, and T. Otsuji
  • Journal Title: Appl. Phys. Lett. Volume: 119 Pages: 093501-1-5
  • DOI: 10.1063/5.0061722
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] THz detection by an asymmetric dual-grating-gate graphene FET (2021)
  • Author(s): K. Tamura, D. Ogiura, K. Suwa, H. Fukidome, A. Satou, Y. Takida, H. Minamide, and T. Otsuji
  • Journal Title: IRMMW-THz: the 46th International Conference on Infrared, Millimeter and Terahertz Waves Proc., Changdu, China, and Online, Aug. 29-Sept. 3, 2021. Volume: 1 Pages: 5103129-1-2
  • DOI: 10.1109/IRMMW-THz50926.2021.9567489
  • Peer Reviewed
• [Journal Article] Coulomb drag by injected ballistic carriers in graphene n+-i-n-n+ structures: doping and temperature effects (2021)
  • Author(s): V. Ryzhii, T. Otsuji, M. Ryzhii, V. Mitin, and M.S. Shur
  • Journal Title: Physica Status Solidi A: Appl. and Mat. Sci. (Top Cover Art) Volume: 218 Pages: 2100535-1-7
  • DOI: 10.1002/pssa.202100535
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Paving the way for tunable graphene plasmonic THz amplifiers (2021)
  • Author(s): Stephane Albon Boubanga-Tombet, Akira Satou, Deepika Yadav, Dmitro B But, Wojciech Knap, Vyacheslav V Popov, Iliya V Gorbenko, Valentin Kachorovskii and Taiichi Otsuji
  • Journal Title: Frontiers in Physics (invited, review) Volume: 9 Pages: 726806-1-10
  • DOI: 10.3389/fphy.2021.726806
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Current driven plasma instability in graphene-FETs with Coulomb electron drag (2021)
  • Author(s): M. Ryzhii, V. Ryzhii, T. Otsuji, V. Mitin, and M.S. Shur
  • Journal Title: COMCAS2021: International Conference on Microwaves, Communications, Antennas, Biomedical Engineering & Electronic Systems, RF3-4, vol. 1, pp. 1-4 Volume: 1 Pages: 1-4
  • DOI: 10.1109/COMCAS52219.2021.9628999
  • Int'l Joint Research
• [Journal Article] Plasmonic field-effect transistors (TeraFETs) for 6G communications (2021)
  • Author(s): M. Shur, G. Aizin, T. Otsuji, and V. Ryzhii
  • Journal Title: Sensors (invited, review) Volume: 21 Pages: 7907-1-16
  • DOI: 10.3390/s21237907
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Effect of Coulomb carrier drag and terahertz plasma instability in p+-p-i-n-n+ graphene tunneling transistor structures (2021)
  • Author(s): V. Ryzhii, M. Ryzhii, A. Satou, T. Otsuji, V. Mitin, and M.S. Shur
  • Journal Title: Phys. Rev. Appl. Volume: 16 Pages: 064054-1-10
  • DOI: 10.1103/PhysRevApplied.16.064054
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] テラヘルツプラズモニック機能デバイスの創出とその次世代Beyond 5G無線通信への応用 (2022)
  • Author(s): 尾辻泰一
  • Organizer: 理研シンポジウム：第9回「光量子工学研究」, Feb. 28, 2022. (invited)
  • Invited
• [Presentation] グラフェンのBeyond 5G超高速無線通信デバイス応用 (2022)
  • Author(s): 尾辻泰一
  • Organizer: 第69回応用物理学会春季学術講演会, シンポジウム「オンライン時代の機能性マテリアルーbeyond 5G/6G に向けてー」, オンライン, March 22-26, 2022. (invited)
  • Invited
• [Presentation] Graphene-based plasmonic metamaterial for terahertz laser transistors (2022)
  • Author(s): T. Otsuji, S. Boubanga-Tombet, A. Satou, D. Yadav, V. Ryzhii, M. Ryzhii, A.A. Dubinov, V.V. Popov, W. Knap, V. Kachorovskii, K. Narahara, V. Mitin, and M.S. Shur
  • Organizer: XXVI International Symposium on Nanophysics and Nanoelectronics, Nizhny Novgorod, Russia, Hybrid, March 14-17, 2022. (invited)
  • Int'l Joint Research / Invited
• [Presentation] グラフェンの理論限界を超えるテラヘルツ電磁波の増幅に成功 ―次世代６Ｇ＆７Ｇ超高速無線通信の実現に光明 (2021)
  • Author(s): 尾辻泰一
  • Organizer: オプトロニクスWEBセミナー「Beyond 5Gとテラヘルツ通信：実用化と将来展望」, Web Online, April 28, 2021. (invited)
  • Invited
• [Presentation] 5Gの先へ！テラヘルツ波デバイスに求められる新材料と要素技術 最先端の研究開発状況と課題・展望 (2021)
  • Author(s): 尾辻泰一
  • Organizer: サイエンス＆テクノロジー セミナー, Web Online, April 21, 2021.
  • Invited
• [Presentation] Fast terahertz detection in asymmetric dual-grating-gate graphene-channel FETs (2021)
  • Author(s): Koichi Tamura, Daichi Ogiura, Kento Suwa, Hirokazu Fukidome, Akira Satou, Y. Takida, H. Minamide, and T. Otsuji
  • Organizer: DRC: 79th Annual Device Research Conference, Web-Online, June 21, 2021.
  • Int'l Joint Research
• [Presentation] A new type of terahertz quantum cascade laser using graphene-based van der Waals heterostructures (2021)
  • Author(s): T. Otsuji
  • Organizer: META: the 11th International Conference on Metamaterials, Photonic Crystals, and Plasmonics Proc., vol. 1, pp. 240-241, Univ. of Warsaw, Warsaw, Poland, Online, July 20-23, 2021. (invited)
  • Int'l Joint Research / Invited
• [Presentation] THz detection by an asymmetric dual-grating-gate graphene FET (2021)
  • Author(s): K. Tamura, D. Ogiura, K. Suwa, H. Fukidome, A. Satou, Y. Takida, H. Minamide, and T. Otsuji
  • Organizer: IRMMW-THz: the 46th International Conference on Infrared, Millimeter and Terahertz Waves, Changdu, China, and Online, Aug. 29-Sept. 3, 2021.
  • Int'l Joint Research
• [Presentation] グラフェン THz デバイスの研究開発動向と将来展望, (2021)
  • Author(s): 尾辻泰一
  • Organizer: 信学会ソサエティ大会, 企画シンポジウム：Beyond 5G、6G に向けたデバイス・材料技術とその応用, オンライン, Sept. 14-17, 2021. (invited)
  • Invited
• [Presentation] 理論限界を超えたテラヘルツ波増幅：6G&7G超高速無線通信への可能性 (2021)
  • Author(s): 尾辻泰一
  • Organizer: レーザー学会 第2回「小型集積レーザー」専門委員会, 分子科学研究所, 愛知県岡崎市, Sept. 22, 2021. (invited)
  • Invited
• [Presentation] Coulomb drag in graphene FETs with the ballistic electron injection (2021)
  • Author(s): V. Ryzhii, M. Ryzhii, V. Mitin, M.S. Shur, and T. Otsuji
  • Organizer: RPGR: Recent Progress on Graphene and 2D materials Research Conference 2021, Seoul, South Korea (Hybrid), Oct. 7, 2021.
  • Int'l Joint Research
• [Presentation] Fast terahertz detection in an asymmetric dual-grating-gate epitaxial graphene-chennel FET (2021)
  • Author(s): D. Ogiura, A. Satou, H. Fukidome, and T. Otsuji
  • Organizer: RPGR: Recent Progress on Graphene and 2D materials Research Conference 2021, Seoul, South Korea (Hybrid), Oct. 7, 2021.
  • Int'l Joint Research
• [Presentation] High Speed Terahertz Detection by an Asymmetric Dual-Grating-Gate Graphene FET (2021)
  • Author(s): K. Tamura, D. Ogiura, K. Suwa, H. Fukidome, A. Satou, Y. Takida, H. Minamide, and T. Otsuji
  • Organizer: RJUSE-TeraTech2021: 9th Russia-Japan-USA-Europe Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies, Sendai, Japan (Hybrid), Nov. 1-4, 2021.
  • Int'l Joint Research
• [Presentation] Current driven plasma instability in graphene-FETs with Coulomb electron drag (2021)
  • Author(s): M. Ryzhii, V. Ryzhii, T. Otsuji, V. Mitin, and M.S. Shur
  • Organizer: COMCAS2021: International Conference on Microwaves, Communications, Antennas, Biomedical Engineering & Electronic Systems, RF3-4, vol. 1, pp. 1-4, Tel Aviv, Israel, Hybrid, Nov. 1-3, 2021.
  • Int'l Joint Research
• [Presentation] 半導体二次元プラズモンを利用したテラヘルツ機能デバイスとその次世代 Beyond 5G無線通信への応用 (2021)
  • Author(s): 尾辻泰一
  • Organizer: 2021年日本真空表面学会学術講演会, 公募シンポジウム「表面真空科学の新分野萌芽の土壌としての Beyond 5G」, 3Aa09, Online, Nov. 3-5, 2021. (invited)
  • Invited
• [Book] THz Communications [Otsuji T., Satou A., Plasma-Wave Devices, pp. 291-296.]] (2022)
  • Author(s): Krurner T., Mittleman D.M., Nagatsuma T. eds.
  • Total Pages: 540
  • Publisher: Springer Nature, Switzerland
  • ISBN: 978-3-030-73737-5
• [Remarks] Otsuji Lab., RIEC, Tohoku Univ., Sendai, Japan
  • URL: https://www.otsuji.riec.tohoku.ac.jp/english/index_en.php