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Photoconductive devices based on quantum dot superlattice for THz generation and detection

Research Project

Project/Area Number 19K04532
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21060:Electron device and electronic equipment-related
Research InstitutionKobe University

Principal Investigator

Wada Osamu  神戸大学, 産官学連携本部, 非常勤講師 (90335422)

Co-Investigator(Kenkyū-buntansha) 小島 磨  千葉工業大学, 工学部, 教授 (00415845)
海津 利行  京都大学, 産官学連携本部, 特定研究員 (00425571)
原田 幸弘  神戸大学, 工学研究科, 助教 (10554355)
北田 貴弘  徳島大学, 大学院社会産業理工学研究部(理工学域), 特任教授 (90283738)
南 康夫  日本大学, 生産工学部, 准教授 (60578368)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsInAs量子ドット / 量子ドット超格子 / 低温成長GaAs / 光伝導アンテナ(PCA) / 超高速キャリア緩和 / 光Hall効果 / 光電流特性 / 電場増強構造 / テラヘルツ波発生 / テラヘルツ波デバイス / THz発生・検知 / 光導電型デバイス
Outline of Research at the Start

テラヘルツ波特有の伝搬特性を利用して、通信、センシング、イメージングの高性能化や新機能の実現ができると期待されている。光導電型(PCA)デバイスはテラヘルツ波発生・検知に必須であるが、将来システムに向けた高性能化が不可欠である。
本研究は、我々独自の量子ドット超格子材料を導入することにより、従来の性能を大幅に凌駕する新しいPCAデバイスを実現するものである。この目的を達成するために、光励起下における光導電の物理機構、特にその超高速現象の詳細を明らかにするとともに、光入射部電界増強効果を考慮した新規量子ドット超格子PCAデバイス構造を生み出すことによって、超高性能デバイスの実現を目指す。

Outline of Final Research Achievements

Photoconductive antenna (PCA) is one of the key devices for wider application of terahertz (THz) systems, and its operation at the telecom wavelength (1550 nm) is demanded. In this study, a novel PCA consisting of InAs/GaAs quantum dot (QD) superlattice has been fabricated by molecular-beam epitaxy technique and characterized for its application to the THz operation under 1550 nm excitation. The photoconductive property of this structure has been studied by evaluating the photo-Hall effect, the excitation power dependence of photocurrent spectra, and the ultrafast pump-probe reflection measurement. A few interesting features found include that this PCA structure has a low dark current and non-saturating hole dominant photocurrent with sub-ps relaxation time, which are favorable for THz operation of these PCAs. THz wave generation at ~1 THz has been successfully demonstrated with this PCA under 1550 nm, ~100 fs pulse excitation.

Academic Significance and Societal Importance of the Research Achievements

本研究で提案したInAs/GaAs QD超格子構造においては構造中のミッドギャップ準位に起因して1550 nm励起下でもPCA動作が期待できる大きな光電流が確認された。さらに、光Hall効果測定からは、光電流には高易動度の正孔電流が寄与していること、また、光電流の励起強度依存性評価からは、高励起域でキャリア再結合過程が現れること、など本構造の物理特性に関する新たな学術的知見が得られた。また、1550 nm励起によるPCA動作の実証は、成熟した光通信用光源の活用が可能で、かつ高性能・安価なTHz発生・検知素子の実現を可能とし、ひいてはTHzシステムの広範な応用を促すものとして社会的意義が大きい。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (60 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (11 results) Journal Article (19 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 19 results,  Open Access: 17 results) Presentation (27 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Book (1 results) Remarks (2 results)

  • [Int'l Joint Research] National Tsing Hua University/National Taiwan Normal University(その他の国・地域)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Duy Tan University(ベトナム)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Aston University(英国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] National Tsing Hua University/National Taiwan Normal University(その他の国・地域(Taiwan))

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Duy Tan University(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Glasgow(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] National Tsing Hua University/National Taiwan Normal University(その他の国・地域(Taiwan))

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Duy Tan University(ベトナム)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Glasgow(英国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] National Tsing Hua University(その他の国・地域(Taiwan))

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 国立清華大学/国立台湾師範大学/東海大学(その他の国・地域(台湾))

    • Related Report
      2019 Research-status Report
  • [Journal Article] Electric Field Enhancement Effect by Localized Surface Plasmon Resonance in Heavily-Doped InAs/GaAs Quantum Dots2024

    • Author(s)
      Mizuto Kawakami, Yukihiro Harada, Shigeo Asahi, Takashi Kita
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 73 Issue: 2 Pages: 178-182

    • DOI

      10.2472/jsms.73.178

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2024-02-15
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Absorption dispersion below boson peak frequency in oxide glasses studied by THz-time domain spectroscopy2024

    • Author(s)
      Wada Osamu、Ramachari Doddoji、Yang Chan-Shan、Uchino Takashi、Pan Ci-Ling
    • Journal Title

      Journal of Applied Physics

      Volume: 135 Issue: 8

    • DOI

      10.1063/5.0191384

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Terahertz wave emission with 1.55mm pump from photoconductive antenna using stacked Er-doped-InAs quantum dot layers with ultrafast carrier relaxation2023

    • Author(s)
      Minami Yasuo、Abe Hiromutsu、Lu Xiangmeng、Kumagai Naoto、Kitada Takahiro
    • Journal Title

      Journal of Applied Physics

      Volume: 134 Issue: 14 Pages: 1431011-6

    • DOI

      10.1063/5.0168174

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characteristics of ultrafast response induced by impulsive interference of excitons in a GaAs/AlAs multiple quantum well on a slightly strained buffer layer2023

    • Author(s)
      Osamu Kojima, Ikuo Tamachii, Takashi Kita
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 6 Pages: 062009-062009

    • DOI

      10.35848/1882-0786/acde42

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generation of nonlinear polarization to emit terahertz waves in above gap states in GaSb/AlGaSb multiple quantum wells2023

    • Author(s)
      Osamu Kojima, Shinnosuke Osaki, Takashi Kita, Kouichi Akahane
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 5 Pages: 051002-051002

    • DOI

      10.35848/1882-0786/acd676

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mechanism of THz dielectric constant enhancement in multi-component oxide glasses investigated by infrared and THz spectroscopies2022

    • Author(s)
      Osamu Wada, Doddoji Ramachari, Chan-Shan Yang, Yukihiro Harada, Takashi Uchino, Ci-Ling Pan
    • Journal Title

      Journal of Physics and Chemistry of Solids

      Volume: 176 Pages: 111237-111237

    • DOI

      10.1016/j.jpcs.2023.111237

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Increase in terahertz-wave intensity in a magnetic field due to difference-frequency mixing by exciton excitation in a GaAs/AlAs multiple quantum well2021

    • Author(s)
      Osamu Kojima, Yuki Tarui, Takashi Kita, Avan Majeed, Pavlo Ivanov, Edmund Clarke, Richard A. Hogg
    • Journal Title

      Optics Express

      Volume: 30 Issue: 7 Pages: 11789-11976

    • DOI

      10.1364/oe.453812

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Increase in terahertz-wave generation by difference frequency mixing by overlap of exciton states in different GaAs/AlAs quantum wells and spectroscopic measurements2021

    • Author(s)
      Kanta Sakaue, Osamu Kojima, Takashi Kita, Matthew J. Steer, Richard A. Hogg
    • Journal Title

      Optics Express

      Volume: 29 Issue: 15 Pages: 24387-24395

    • DOI

      10.1364/oe.431329

    • NAID

      120007124101

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Modulation of exciton states through resonant excitation by continuous wave lasers in a GaAs/AlAs multiple quantum well2021

    • Author(s)
      Osamu Kojima, Takashi Kita, Matthew J Steer, Richard A Hogg
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 54 Issue: 33 Pages: 335106-335106

    • DOI

      10.1088/1361-6463/ac03ea

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Interrelationship among dielectric constant, energy band parameters and ionicity in multi-component oxide glasses revealed by optical- and THz-band spectroscopy2021

    • Author(s)
      Osamu Wada, Doddoji Ramachari, Chan-Shan Yang, Ci-Ling Pan
    • Journal Title

      Journal of Non-Crystalline Solids

      Volume: 573 Pages: 121135-121135

    • DOI

      10.1016/j.jnoncrysol.2021.121135

    • NAID

      120007167218

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Systematic characterization of THz dielectric properties of multi-component glasses using the unified oscillator model2021

    • Author(s)
      Wada Osamu、Ramachari Doddoji、Yang Chan-Shan、Uchino Takashi、Pan Ci-Ling
    • Journal Title

      Optical Materials Express

      Volume: 11 Issue: 3 Pages: 858-858

    • DOI

      10.1364/ome.417771

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bandwidth enhancement in an InGaN/GaN three-section superluminescent diode for optical coherence tomography2020

    • Author(s)
      Goldberg Graham R.、Kim Dae-Hyun、Taylor Richard J. E.、Childs David T. D.、Ivanov Pavlo、Ozaki Nobuhiko、Kennedy Kenneth L.、Groom Kristian M.、Harada Yukihiro、Hogg Richard A.
    • Journal Title

      Applied Physics Letters

      Volume: 117 Issue: 6 Pages: 061106-061106

    • DOI

      10.1063/5.0010795

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High refractive index properties of oxyfluorosilicate glasses and a unified dielectric model of silicate oxide glasses in the sub-terahertz frequency region2020

    • Author(s)
      Wada Osamu、Ramachari Doddoji、Yang Chan-Shan、Uchino Takashi、Pan Ci-Ling
    • Journal Title

      Optical Materials Express

      Volume: 10 Issue: 2 Pages: 607-607

    • DOI

      10.1364/ome.382686

    • NAID

      120007017140

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High-refractive index, low-loss oxyfluorosilicate glasses for sub-THz and millimeter wave applications2019

    • Author(s)
      Ramachari Doddoji、Yang Chan-Shan、Wada Osamu、Uchino Takashi、Pan Ci-Ling
    • Journal Title

      Journal of Applied Physics

      Volume: 125 Issue: 15 Pages: 151609-151609

    • DOI

      10.1063/1.5083091

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Wide-wavelength-range control of photoluminescence polarization in closely stacked InAs/GaAs quantum dots2019

    • Author(s)
      Kaizu Toshiyuki、Tajiri Yusuke、Kita Takashi
    • Journal Title

      Journal of Applied Physics

      Volume: 125 Issue: 23 Pages: 234304-234304

    • DOI

      10.1063/1.5096411

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effect of modulation of ultrafast transient carrier dynamics by interface on terahertz signal2019

    • Author(s)
      Yamamoto Shintaro、Kojima Osamu、Kita Takashi
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1220 Issue: 1 Pages: 012013-012013

    • DOI

      10.1088/1742-6596/1220/1/012013

    • NAID

      120006713581

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hot-carrier generation and extraction in InAs/GaAs quantum dot superlattice solar cells2019

    • Author(s)
      Yukihiro Harada, Naoto Iwata, Shigeo Asahi, Takashi Kita
    • Journal Title

      Semiconductor Science and Technology

      Volume: 34 Issue: 9 Pages: 094003-094003

    • DOI

      10.1088/1361-6641/ab33a2

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bound-to-continuum intraband transition properties in InAs/GaAs quantum dot superlattice solar cells2019

    • Author(s)
      Yukihiro Harada, Shigeo Asahi, Takashi Kita
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 12 Pages: 125008-125008

    • DOI

      10.7567/1882-0786/ab56ef

    • NAID

      210000157573

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of a thin nitrogen-doped layer on terahertz dynamics in GaAs containing InAs quantum dots2019

    • Author(s)
      Kojima Osamu、Izumi Ryo、Kita Takashi
    • Journal Title

      OSA Continuum

      Volume: 2 Issue: 5 Pages: 1621-1621

    • DOI

      10.1364/osac.2.001621

    • NAID

      120006621636

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] GaSb/AlGaSb多重量子井戸における差周波混合によるテラヘルツ電磁波発生2024

    • Author(s)
      小島 磨
    • Organizer
      第71回応用物理学会春季学術講演会 [25a-12K-2]
    • Related Report
      2023 Annual Research Report
  • [Presentation] 高強度テラヘルツ波による超イオン伝導体内のイオン駆動2023

    • Author(s)
      南康夫
    • Organizer
      テラヘルツ光科学の最新トレンド2023
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Localized Surface Plasmon Resonance of Quantum Dots in Two-Step Photon Up-Conversion Solar Cell Structures2023

    • Author(s)
      Y. Harada, M. Kawakami, S. Asahi, and T. Kita
    • Organizer
      50th IEEE Photovoltaic Specialists Conference (2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高ドープInAs/GaAs量子ドットにおける局在表面プラズモン共鳴による赤外光吸収増強2023

    • Author(s)
      川上瑞人, 原田幸弘, 朝日重雄, 喜多隆
    • Organizer
      第84回応用物理学会秋季学術講演会 (2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Enhanced Near-Infrared Absorption by Localized Surface Plasmon Resonance in Heavily-Doped InAs/GaAs Quantum Dots2023

    • Author(s)
      Y. Harada, M. Kawakami, S. Asahi, and T. Kita
    • Organizer
      第42回電子材料シンポジウム (2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] 局在表面プラズモン共鳴による高ドープInAs/GaAs量子ドットにおける赤外光吸収増強2023

    • Author(s)
      川上瑞人, 原田幸弘, 朝日重雄, 喜多隆
    • Organizer
      第34回光物性研究会 (2023)
    • Related Report
      2023 Annual Research Report
  • [Presentation] ドープされたInAs/GaAs量子ドットにおける局在表面プラズモン共鳴による電場増強効果2023

    • Author(s)
      川上瑞人, 原田幸弘, 朝日重雄, 喜多隆
    • Organizer
      日本材料学会半導体エレクトロニクス部門委員会2022年度第3回研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] GaSb/AlGaSb多重量子井戸における障壁層励起による差周波混合過程に対する井戸幅依存性2022

    • Author(s)
      小島磨 他
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] ダブルパルス-ポンププローブ法によるGaAs/AlAs多重量子井戸における超高速応答の評価2022

    • Author(s)
      小島磨 他
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] GaAs/AlAs多重量子井戸における励起子共鳴励起条件下での光変調反射信号2021

    • Author(s)
      小島 磨, R. Hogg
    • Organizer
      日本物理学会2021年秋季大会, online, 22aE1-5
    • Related Report
      2021 Research-status Report
  • [Presentation] GaAs多層膜におけるテラヘルツ波放射に対する電場遮蔽効果2021

    • Author(s)
      長谷川 尊之, 小島 磨, 金 大貴
    • Organizer
      第82回応用物理学会秋季学術講演会, online, 12p-N303-11
    • Related Report
      2021 Research-status Report
  • [Presentation] GaSb/AlGaSb多重量子井戸における障壁層励起での差周波混合法によるテラヘルツ電磁波発生2021

    • Author(s)
      小島 磨, 喜多 隆, 赤羽 浩一
    • Organizer
      第82回応用物理学会秋季学術講演会, online, 12p-N303-10
    • Related Report
      2021 Research-status Report
  • [Presentation] 光電流マッピング法を用いた多重積層InAs/GaAs量子ドット構造光伝導アンテナの電気特性評価2021

    • Author(s)
      南康夫, 中塚 玲雄, 北田 貴弘, 原田 幸弘, 海津 利行, 小島 磨, 喜多 隆, 和田 修
    • Organizer
      2021年第82回応用物理学会秋季学術講演会, 12p-N303-9, 講演予稿集, p. 12-201, オンライン
    • Related Report
      2021 Research-status Report
  • [Presentation] 光伝導アンテナ応用へ向けた多重積層InAs/GaAs量子ドットの電気特性評価2021

    • Author(s)
      南康夫, 新免歩, 北田貴弘, 原田幸弘, 海津利行, 小島磨, 喜多隆, 和田修
    • Organizer
      2021年第68回応用物理学会春季学術講演会(講演予稿集 p. 12-258, オンライン, 2021年3月19日)
    • Related Report
      2020 Research-status Report
  • [Presentation] 光伝導アンテナ応用へ向けた多重積層InAs/GaAs量子ドットの光学特性評価2021

    • Author(s)
      海津利行, 小濱一晟, 南康夫, 北田貴弘, 原田幸弘, 小島磨, 喜多隆, 和田修
    • Organizer
      2021年第68回応用物理学会春季学術講演会(講演予稿集19a-Z23-3, オンライン, 2021年3月19日)
    • Related Report
      2020 Research-status Report
  • [Presentation] 多重積層InAs/GaAs量子ドットを用いた光伝導アンテナの作製2020

    • Author(s)
      海津利行、北田貴弘、南康夫、原田幸弘、小島磨、喜多隆、和田修
    • Organizer
      第67回応用物理学会春季学術講演会(上智大学、2020. 3. 12-15)
    • Related Report
      2019 Research-status Report
  • [Presentation] 2段階フォトンアップコンバージョン太陽電池におけるバンド内遷移特性2020

    • Author(s)
      原田幸弘、草木和輝、朝日重雄、喜多隆
    • Organizer
      第67回応用物理学会春季学術講演会(上智大学、2020. 3. 12-15)
    • Related Report
      2019 Research-status Report
  • [Presentation] テラヘルツ分光を用いた多成分ガラスの誘電特性モデル2020

    • Author(s)
      和田修、Ramachari, Doddoji、Yang, Chan-Shan、内野隆、Pan, Ci-Ling
    • Organizer
      第67回応用物理学会春季学術講演会(上智大学、2020. 3. 12-15)
    • Related Report
      2019 Research-status Report
  • [Presentation] THz spectroscopy analysis of oxifluorosilicate glass and a unified dielectric model of silicate oxide glasses in sub-THz region2019

    • Author(s)
      Wada, Osamu、Ramachari, Doddoji、Yang, Chan-Shan、Uchino, Takashi、Pan, Ci-Ling
    • Organizer
      SPIE.COS Photonics Asia 2019 (Hanzou, China, Oct. 20-23, 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Tail-Suppressed THz Photocurrent by a Bi-Polar Photoconductive Antenna Fabricated on Semi-insulating GaAs2019

    • Author(s)
      Anup Kumar Sahoo ; Hsiao-Hua Wu ; Yu-Cheng Hong ; Yu-Chen Chang ; Osamu Wada ;Ci-Ling Pan
    • Organizer
      44th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)(Paris,Sept.1-6, 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Extension of excitation energy to generate terahertz wave to smaller than GaAs bandgap energy due to growth of InAs quantum dots and nitrogen doped layer2019

    • Author(s)
      O. Kojima, T. Kita
    • Organizer
      Compound Semiconductor Week 2019 (Nara, May)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Efficient Hot-Carrier Generation in InAs/GaAs Quantum Dot Superlattices2019

    • Author(s)
      Y. Harada, N. Iwata, D. Watanabe, S. Asahi, and T. Kita
    • Organizer
      International Conference on Nano-photonics and Nano-optoelectronics 2019(Yokohama, April 22-26, 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Hot-Carrier Extraction in InAs/GaAs Quantum Dot Superlattice Solar Cells2019

    • Author(s)
      Y. Harada, N. Iwata, D. Watanabe, S. Asahi, and T. Kita
    • Organizer
      46th IEEE Photovoltaic Specialists Conference (Chicago, June 16-21, 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Excitation Energy Dependence of Hot-Carrier Extraction Process in InAs/GaAs Quantum Dot Superlattice Solar Cells2019

    • Author(s)
      Y. Harada, N. Iwata, S. Asahi, and T. Kita
    • Organizer
      7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures ( Kobe, September 24-27, 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Polarization-insensitive optical gain of highly stacked InAs/GaAsquantum dot semiconductor optical amplifier2019

    • Author(s)
      T. Kaizu, T. Kakutani, T. Kita
    • Organizer
      7th International Workshop on Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures ( Kobe, September 24-27, 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] InAs/GaAs量子ドット超格子におけるホットキャリア生成過程2019

    • Author(s)
      原田幸弘、松井麻斗、喜多隆
    • Organizer
      第80回応用物理学会秋季学術講演会(北海道大学、2019. 9. 18-21)
    • Related Report
      2019 Research-status Report
  • [Presentation] Hot-Carrier Extraction from InAs/GaAs Quantum Dot Superlattices Embedded in GaAs Solar Cells2019

    • Author(s)
      Y. Harada, N. Iwata, S. Asahi, and T. Kita
    • Organizer
      第38回電子材料シンポジウム (THE KASHIHARA、2019. 10. 9-11)
    • Related Report
      2019 Research-status Report
  • [Book] Trends in Terahertz Technology (Chap. Title: Systematic Characterization of High-Dielectric Constant Glass Materials Using THz-TDS Technique)2023

    • Author(s)
      Osamu Wada, Doddoji Ramachari, Chan-Shan Yang, Takashi Uchino and Ci-Ling Pan (Book Edited by Y. M. Meziani and J. E. Velazquez-Perez)
    • Total Pages
      148
    • Publisher
      IntechOpen (DOI: 10.5772/intechopen.111635)
    • ISBN
      9781837681693
    • Related Report
      2023 Annual Research Report
  • [Remarks] 小島磨

    • URL

      http://www.research.kobe-u.ac.jp/eng-photonics/kojima/Kojima.htm

    • Related Report
      2019 Research-status Report
  • [Remarks] 原田幸弘

    • URL

      http://www.research.kobe-u.ac.jp/eng-photonics/harada/index.html

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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