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Plasmonic enhancement of photo-absorption in low-temperature-grown GaAs and its application to terahertz wave detection

Research Project

Project/Area Number 18K04980
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 30020:Optical engineering and photon science-related
Research InstitutionHiroshima University

Principal Investigator

Kadoya Yutaka  広島大学, 先進理工系科学研究科(先), 教授 (90263730)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsテラヘルツ / 光伝導アンテナ / 低温成長GaAs / プラズモニクス / 非線形吸収 / テラヘルツアンテナ / 近接場
Outline of Final Research Achievements

We investigated the way of realizing high performance photoconductive antenna used in terahertz time-domain-spectroscopy based on the pulse laser working at 1.5 micrometer. In the photoconductive antennas made on low-temperature-grown GaAs which has very low noise characteristics, we enhance the nonlinear photo-absorption by utilizing surface plasmon resonance in nanometer-scale metal patterns and the Fabry-Perot resonance and eventually improve the efficiency of THz generation and sensitivity of THz detection. We clarified that by adopting a distributed Bragg reflector in the substrate, a large enhancement of light intensity can be realized in the device which can be fabricated based on the electron-beam lithography. In addition, we quantified the linear and nonlinear absorption coefficients in low-temperature-grown GaAs at 1.5 micrometer. Moreover, we clarified the device parameter dependence of the signal and noise in the photoconductive antenna made on low-temperature-grown GaAs.

Academic Significance and Societal Importance of the Research Achievements

安定性,価格,小型化に優れたErドープファイバーレーザー駆動のテラヘルツ時間領域分光システムの高性能化が実現し,応用範囲が広がる.またファイバーを用いた可搬型のTHz波発生・検出素子が可能になり,極低温,強磁場等の特殊な環境下でのテラヘルツ時間領域分光が容易になる.また,プラズモニクス研究としては,半導体等の実用上重要な基板に設けたメタルナノパターンにおける近接場増強の理学と工学が進展する.一方,半導体光物性的には,低温成長GaAsにおける線形,非線形吸収が定量化され,この材料における非線形光学応答の物理的理解が進む.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (15 results)

All 2020 2019 2018

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 4 results)

  • [Journal Article] Bound states in the continuum and exceptional points in dielectric waveguide equipped with a metal grating2020

    • Author(s)
      Kikkawa Ryo、Nishida Munehiro、Kadoya Yutaka
    • Journal Title

      New Journal of Physics

      Volume: 22 Issue: 7 Pages: 073029-073029

    • DOI

      10.1088/1367-2630/ab97e9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measurement and Analysis of Noise Spectra in Terahertz Wave Detection Utilizing Low-temperature-grown GaAs Photoconductive Antenna2019

    • Author(s)
      Masahiro Nitta, Ryota Nakamura, and Yutaka Kadoya
    • Journal Title

      Journal of Infrared, Millimeter, and Terahertz Waves

      Volume: 40 Issue: 11-12 Pages: 1150-1159

    • DOI

      10.1007/s10762-019-00633-w

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Polarization-based branch selection of bound states in the continuum in dielectric waveguide modes anti-crossed by a metal grating2019

    • Author(s)
      Kikkawa R、Nishida M、Kadoya Y
    • Journal Title

      New Journal of Physics

      Volume: 21 Issue: 11 Pages: 113020-113020

    • DOI

      10.1088/1367-2630/ab4f54

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 半導体基板上金属グレーティングにおける開口下の光増強2019

    • Author(s)
      吉川 遼, 合田 圭佑, 上山 大輝, 西田 宗弘, 角屋 豊
    • Journal Title

      レーザー研究

      Volume: 47 Pages: 375-379

    • NAID

      130008074180

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 金属グレーティングによる半導体中表面近傍の光増強 - 金属開口下の増強を決める要因2019

    • Author(s)
      吉川 遼, 合田 圭佑, 上山 大輝, 西田 宗弘, 角屋 豊
    • Journal Title

      レーザー研究

      Volume: 47

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Impact of electrical contact between electrode metal and low-temperature-grown GaAs on the signal and noise of photoconductive antennas for THz wave detection2020

    • Author(s)
      Yutaka Kadoya
    • Organizer
      SPIE Defense + Commercial Sensing
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Terahertz Time-Domain Spectroscopy Using Photoconductive Antenna2020

    • Author(s)
      Yutaka Kadoya
    • Organizer
      2020 IEEE International Symposium on Radio-Frequency Integration Technology
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 金属グレーティングを有する誘電体導波路における反交差を伴う連続準位中束縛状態:金属厚さ依存性2019

    • Author(s)
      吉川 遼、西田 宗弘、角屋 豊
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Bound states in the continuum in the dielectric waveguide with metal grating controlled by polarization2019

    • Author(s)
      Ryo Kikkawa, Munehiro Nishida, Yutaka Kadoya
    • Organizer
      The 42nd PhotonIcs & Electromagnetics Research Symposium (PIERS)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Noises in photoconductive antennas under fs pulse excitation2019

    • Author(s)
      Yutaka Kadoya
    • Organizer
      The 5th International Symposium on Microwave/THz Science and Applications
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 金属グレーティングによって反交差した誘電体導波路モードにおける連続準位中束縛状態:偏光による出現枝選択2019

    • Author(s)
      吉川 遼,西田 宗弘,角屋 豊
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 光伝導アンテナにおける雑音の定量評価2019

    • Author(s)
      中村 亮太,新田 真大,角屋 豊
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Quantitative evaluation of linear and nonlinear absorption at 1560 nm in low-temperature-grown GaAs for the use in photoconductive antennas2018

    • Author(s)
      Yutaka Kadoya
    • Organizer
      The 11th Asia-Pacific Laser Symposium
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] THz波検出用低温成長GaAs光伝導アンテナにおける雑音の解析2018

    • Author(s)
      新田真大,角屋豊
    • Organizer
      2018年度応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] THz波検出用光伝導アンテナのための金属負レーティングの設計2018

    • Author(s)
      合田圭佑,吉川遼,上山大輝,西田宗弘,角屋豊
    • Organizer
      2018年度応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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