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Novel broadband mid-infrared emitting quantum structures fabricated by metal organic vapor phase epitaxy

Research Project

Project/Area Number 22K04245
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 InstitutionUniversity of Miyazaki

Principal Investigator

Maeda Koji  宮崎大学, 工学部, 教授 (50219268)

Co-Investigator(Kenkyū-buntansha) 藤澤 剛  法政大学, 理工学部, 教授 (70557660)
荒井 昌和  宮崎大学, 工学部, 准教授 (90522003)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2024: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords超格子 / 中赤外発光 / フォトルミネッセンス / バンド構造計算 / MOCVD / 発光遷移 / 温度依存性 / 励起強度依存性 / バンド構造 / 超格子構造 / 中赤外光源 / MOVPE法 / バンド計算 / 励起光強度依存性 / エネルギーバンド計算 / 発光の温度-励起強度ダイアグラム / 発光遷移図 / PLスペクトル / MOVPE / InAs/GaSb / 中赤外線
Outline of Research at the Start

中赤外線領域(2-10 μm)は、分子の吸収が近赤外領域より桁違いに大きく、微量物質の検出などで最適の波長帯である。量産性の高い有機金属気相成長法を用いた超格子構造を作製し、これまでにない広帯域発光光源を実現する。従来の発光デバイスは、超格子に由来する量子準位間の最低のエネルギーであるバンドギャップ付近の発光を中心に利用していた。本課題で取り組む新しい方法は、超格子構造より計算で求めた電子の状態密度と電子占有状態に基づいて、広範囲の準位からの発光も利用する。これにより、これまで実現されていない約3 μm幅を持つ非熱的高効率広帯域 中赤外発光光源の開発を目指す。

Outline of Final Research Achievements

The goal of this research is to create a device capable of emitting infrared light over a wide range of wavelengths. First, band structure calculations revealed that a design between higher energy levels was more important than between the lowest levels for strong light emission at room temperature. Next, materials were fabricated based on that design, but the luminescence was weaker than expected. Therefore, we improved the intensity by devising protective and buffer layers, which were not taken into account in the calculations. From the luminescence details, it was found that the emission tended to match the predicted spectral shape at low temperatures and in weak light, but that there were wavelength differences and a decrease in intensity in strong light. Although luminescence over a wide wavelength range was achieved at room temperature, due to the decrease in luminescence intensity with increasing temperature, we will aim to reduce defects in the future.

Academic Significance and Societal Importance of the Research Achievements

室温で励起強度を変化させて発光強度やスペクトル形状まで計算し、その構造を実際に作製し計算と実験のスペクトルを比較したことは、学術的に意義がある。まだ、発光強度は強くないが計算上中赤外領域で広い発光波長範囲をもつtype II超格子が実現できる可能性を示せたことは、実現する上で意義がある結果となった。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (13 results)

All 2025 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Excitation intensity and temperature dependence of photoluminescence in mid-infrared region for lattice-matched InAs/GaAsSb superlattice grown by metalorganic vapor-phase epitaxy2025

    • Author(s)
      Maeda Koji、Fujisawa Takeshi、Arai Masakazu
    • Journal Title

      Journal of Materials Science: Materials in Electronics

      Volume: 36 Issue: 2

    • DOI

      10.1007/s10854-024-14142-7

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Metal Organic Vapor‐Phase Epitaxy Growth of Multilayer Stacked InAsSb/InAsP Superlattices on GaAs and InAs Substrate2024

    • Author(s)
      Hombu Koki、Hikita Kenshiro、Fujisawa Takeshi、Maeda Koji、Arai Masakazu
    • Journal Title

      physica status solidi (a)

      Volume: - Issue: 13

    • DOI

      10.1002/pssa.202300824

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] MOVPE法で作製したGaSb層厚を変化させたInAs/GaSb超格子の中赤外発光過程2022

    • Author(s)
      前田 幸治, 大濱 寛士, 岩切 優人, 荒井 昌和, 藤澤 剛
    • Journal Title

      宮崎大学工学部紀要

      Volume: 51 Pages: 35-40

    • Related Report
      2022 Research-status Report
  • [Presentation] 有機金属気相成長法によって作製されたInAs/GaAsSb 超格子のAs組成比による発光の変化2025

    • Author(s)
      奥田大晴, 荒井昌和, 藤澤剛, 鈴木秀俊, 前田幸治
    • Organizer
      2025年第72回応用物理学会春季学術講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 有機金属気相成長法による中赤外波長帯超格子および共振器構造の作製2024

    • Author(s)
      荒井昌和、藤澤 剛、前田幸治
    • Organizer
      2024年光エレクトロニクス研究会(OPE)
    • Related Report
      2024 Annual Research Report
  • [Presentation] Excitation Intensity Dependence of Photoluminescence in Mid-Infrared Region for Lattice-Matched InAs/GaAsSb Superlattice Grown by MOVPE Method2024

    • Author(s)
      Koji Maeda, Takeshi Fujisawa and Masakazu Arai
    • Organizer
      10th International Conference on Optical, Optoelectronic and Photonic Materials and Applications
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optical Transition Energy of InAs/GaSb Type-II Superlattice Investigated by Using Photoluminescence and Photoreflectance Spectroscopy2024

    • Author(s)
      Yatabe T., Taketa N., Arai M., Maeda K., Ikari T., Fukuyama A.
    • Organizer
      28th Microoptics Conference, MOC 2023
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] MOVPE法で作製した格子整合系 InAs/GaAsSb超格子の中赤外発光の温度依存性2023

    • Author(s)
      小佐治 大輔、荒井 昌和、藤澤 剛、前田 幸治
    • Organizer
      2023年第84回応用物理学会
    • Related Report
      2023 Research-status Report
  • [Presentation] MOVPE法で作製した格子整合 InAs/GaAsSb超格子の中赤外領域にお ける発光の励起強度依存性2023

    • Author(s)
      前田 幸治、藤澤 剛、荒井 昌和
    • Organizer
      2023年第84回応用物理学会
    • Related Report
      2023 Research-status Report
  • [Presentation] Temperature Dependence of Mid-infrared Emission Process of InAs/GaSb Superlattices Grown by MOVPE2022

    • Author(s)
      Masakazu ARAI, Koji MAEDA, Yuto IWAKIRI and Takeshi FUJISAWA
    • Organizer
      CLEO-PR 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Wide Wavelength Range Emission from InAs/GaSb Type-II Superlattice Grown by MOVPE2022

    • Author(s)
      Masakazu Arai, Yuto Iwakiri, Takeshi Fujisawa, and Koji Maeda
    • Organizer
      28th International Semicondutor Laser Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] MOVPE法で作製したInAs/GaSb超格子の中赤外領域における広域発光2022

    • Author(s)
      岩切 優人, 荒井 昌和 , 藤澤 剛 , 前田 幸治
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 発光素子2022

    • Inventor(s)
      前田幸治、荒井昌和、藤澤剛
    • Industrial Property Rights Holder
      前田幸治、荒井昌和、藤澤剛
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-134276
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2026-01-16  

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