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Development of a swept-source based on quantum dots with controlled gain spectra and its application in OCT

Research Project

Project/Area Number 20H02183
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionWakayama University

Principal Investigator

Ozaki Nobuhiko  和歌山大学, システム工学部, 教授 (30344873)

Co-Investigator(Kenkyū-buntansha) 池田 直樹  国立研究開発法人物質・材料研究機構, 技術開発・共用部門, 主任エンジニア (10415771)
渡辺 英一郎  国立研究開発法人物質・材料研究機構, 技術開発・共用部門, エンジニア (10469786)
久保 隆史  和歌山県立医科大学, 医学部, 博士研究員 (30316096)
赤阪 隆史  和歌山県立医科大学, 医学部, 特別研究員 (70322584)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Keywords量子ドット / 近赤外光源 / 光コヒーレンストモグラフィー / 波長掃引光源 / 光コヒーレンストモグラフィー(OCT) / 分子線エピタキシー(MBE) / OCT
Outline of Research at the Start

近赤外光を用いた非侵襲な医療用断層イメージング技術である光コヒーレンストモグラフィー(OCT)の画像性能(分解能や画像深さ)向上に貢献すべく、半導体ナノ材料である自己組織化InAs量子ドット(QD)を用いた広帯域波長掃引レーザ光源の開発を行う。自己組織化InAs-QDは、特有のサイズ分布による広帯域な発光および利得特性を近赤外波長帯に有しており、この特性に加え、我々が培ってきた発光波長制御を含むQD成長技術を駆使して、広帯域かつシームレスな光学利得媒体とすることで、従来光源を凌駕する分解能と画像深さを実現するOCT光源への応用を目指す。

Outline of Final Research Achievements

A near-infrared swept-source (SS) was developed using self-assembled InAs quantum dots (QDs) and applied in SS optical coherence tomography (SS-OCT). InAs-QDs in an ensemble configuration offer broadband light emission and optical gain owing to their inherent size distribution whithin the near-infrared wavelength band, making them highly suitable for OCT light sources. Furthermore, the emission center wavelength of QDs can be controlled by varying the growth conditions. Thus, the optical gain peak can be controlled within the 1-1.1 μm band, which is useful for obtaining a large imaging depth of OCT. We fabricated the QD-based SS with controlled gain spectra and employed it in SS-OCT. Through obtained OCT images, we quantitatively evaluated its potential as an SS-OCT light source.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、利得特性を制御したInAs量子ドットによる波長掃引光源の実現および波長掃引型OCTへの応用の可能性が示された。この結果は、OCTに有用な波長帯での新たな波長掃引光源の提供につながる意義ある成果といえる。特に、既存光源では実現しにくい波長帯での高利得媒体を半導体材料によって提供できるため、光源の小型・軽量化といったメリットにつながり、OCTの新たな応用展開も期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (25 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results) Presentation (18 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] グラスゴー大学(英国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] グラスゴー大学(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] グラスゴー大学(英国)

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Near-infrared dual-wavelength surface-emitting light source using InAs quantum dots resonant with vertical cavity modes2022

    • Author(s)
      Oshima Jin、Ozaki Nobuhiko、Oda Hisaya、Watanabe Eiichiro、Ohsato Hirotaka、Ikeda Naoki、Sugimoto Yoshimasa、Hogg Richard A.
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SD Pages: SD1003-SD1003

    • DOI

      10.35848/1347-4065/ac5b24

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] In-situ estimation of emission wavelength of embedded InAs QDs using RHEED intensity measurements2022

    • Author(s)
      Ozaki Nobuhiko、Ikuno Daigo
    • Journal Title

      Journal of Crystal Growth

      Volume: 588 Pages: 126657-126657

    • DOI

      10.1016/j.jcrysgro.2022.126657

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 1.1 μm waveband tunable laser using emission-wavelength-controlled InAs quantum dots for swept-source optical coherence tomography applications2021

    • Author(s)
      Tsuji Toshiya、Ozaki Nobuhiko、Yamauchi Sho、Onoue Katsuya、Watanabe Eiichiro、Ohsato Hirotaka、Ikeda Naoki、Sugimoto Yoshimasa、Childs David T. D.、Hogg Richard A.
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SB Pages: SBBE02-SBBE02

    • DOI

      10.35848/1347-4065/abe5bc

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 二層積層InAs量子ドットへのキャッピングレート制御による発光長波長化2023

    • Author(s)
      奥野 光基、祝出 航佑、尾崎 信彦
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Near-infrared broadband light sources developed using self-assembled InAs quantum dots for OCT applications2022

    • Author(s)
      Nobuhiko Ozaki
    • Organizer
      Joint Symposia on Optics, Optics & Photonics Japan 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 発光波長制御された自己組織化InAs量子ドットによる近赤外広帯域光源開発とOCTへの応用2022

    • Author(s)
      尾崎 信彦
    • Organizer
      日本結晶成長学会第51回結晶成長国内会議
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 半導体量子ドットの発光と生物・医療分野への応用~サイズによる発光波長制御がもたらす可能性~2022

    • Author(s)
      尾崎 信彦
    • Organizer
      生物発光化学発光研究会第37回学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 1um帯広帯域高強度発光InGaAs薄膜の成長条件の検討(II)2022

    • Author(s)
      祝出 航佑、奥野 光基、尾崎 信彦
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Dot-in-a-Well構造におけるInAs量子ドットの構造および発光特性変化のメカニズム2022

    • Author(s)
      奥野 光基、岡田 直樹、尾崎 信彦
    • Organizer
      応用物理学会関西支部2022年度75周年記念講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 1um帯広帯域高強度発光InGaAs薄膜の成長条件の検討2022

    • Author(s)
      祝出 航佑、尾崎 信彦
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Near-infrared dual-wavelength surface-emitting light source using a vertical cavity resonating with discrete emission wavelengths of InAs quantum dots2021

    • Author(s)
      J. Oshima, N. Ozaki, H. Oda, E. Watanabe, H. Ohsato, N. Ikeda, Y. Sugimoto, and R. Hogg
    • Organizer
      34th International Microprocesses and Nanotechnology Conference (MNC 2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Broadband Emission from Stacked InAs Quantum Dots Embedded with GaAs Layers Under Various Growth Rates for Broadband Light Source Applications2021

    • Author(s)
      T. Wang, J. Oshima, H. Ohsato, E. Watanabe, N. Ikeda, Y. Sugimoto, and N. Ozaki
    • Organizer
      21st Int. Conf. Molecular Beam Epitaxy (21st ICMBE)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of In Segregation on InAs Quantum Dots Growth in Dot-in-a-Well2021

    • Author(s)
      N. Okada, D. Ikuno, T. Wang, J. Oshima, and N. Ozaki
    • Organizer
      21st Int. Conf. Molecular Beam Epitaxy (21st ICMBE)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] InAs量子ドットを利用した近赤外多波長面発光レーザの検討2021

    • Author(s)
      大島 仁、尾崎 信彦、小田 久哉、渡辺 英一郎、大里 啓孝、池田 直樹、杉本 喜正、R. Hogg
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 1ミクロン帯広帯域発光InGaAs薄膜の作製と評価2021

    • Author(s)
      祝出 航佑、尾崎 信彦
    • Organizer
      応用物理学会関西支部2021年度第2回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 新規半導体ナノ材料によるOCT用近赤外広帯域光源2021

    • Author(s)
      尾崎 信彦
    • Organizer
      MOBIO産学連携オフィス テーマ別大学・高専合同シーズ発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 1.1um帯InAs量子ドット波長掃引レーザを用いたSS-OCTの構築と評価2021

    • Author(s)
      辻 敏弥、尾崎 信彦、渡辺 英一郎、大里 啓孝、池田 直樹、杉本 喜正、David T. D. Childs、Richard A. Hogg
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] GaAsキャッピング層の成長レートによるInAs量子ドットの発光波長制御及び広帯域光源への応用2021

    • Author(s)
      王 涛、大島 仁、祝出 航佑、尾崎 信彦
    • Organizer
      応用物理学会関西支部2020年度第1回+第2回合同講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] InAs量子ドットを用いた近赤外広帯域面発光レーザの検討2021

    • Author(s)
      大島 仁、王 涛、尾崎 信彦
    • Organizer
      応用物理学会関西支部2020年度第1回+第2回合同講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Tunable Laser with Emission-Wavelength-Controlled InAs Quantum dots for 1.1-um Waveband Swept-Source Optical Coherence Tomography Applications2020

    • Author(s)
      Toshiya Tsuji, Nobuhiko Ozaki, Sho Yamauchi, Katsuya Onoue, Eiichiro Watanabe, Hirotaka Ohsato, Naoki Ikeda, Yoshimasa Sugimoto, David T. D. Childs, and Richard A. Hogg
    • Organizer
      The 2020 International Conference on Solid State Devices and Materials (SSDM2020)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] GaAsキャッピング層の成長レートによる埋め込まれたInAs-QDのサイズおよび発光波長制御2020

    • Author(s)
      王 涛、大島 仁、尾崎 信彦、池田 直樹、杉本 喜正
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] 多波長光源及び多波長光源システム2021

    • Inventor(s)
      尾崎信彦、大島 仁
    • Industrial Property Rights Holder
      和歌山大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-136639
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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