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Highly pure and stable single photon source

Research Project

Project/Area Number 17K06396
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Electron device/Electronic equipment
Research InstitutionHokkaido University (2018-2019)
Hachinohe Institute of Technology (2017)

Principal Investigator

ODASHIMA Satoru  北海道大学, 電子科学研究所, 特任助教 (20518451)

Co-Investigator(Kenkyū-buntansha) 笹倉 弘理  北海道大学, 工学研究院, 准教授 (90374595)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords量子ドット / 単一光子 / 光量子デバイス / 半導体量子ドット / 金属埋め込み / 多チャンネル化 / 発光波長チューニング / 共鳴励起 / 長期安定性 / マイクロ・ナノデバイス / 半導体超微細化
Outline of Final Research Achievements

The generation of a single photon and its on-demand operation provides highly secure information technology based on quantum cryptography.
In this research, we fabricated the semiconductor single photon sources (SPSs) by using semiconductor InAs quantum dots (QDs) grown by molecular-beam epitaxy. The epitaxially QD grown GaAs substrates were processed in the form of a pillar array structure by using electron-beam lithography and reactive-ion etching. By optimizing the diameter of pillars and the lattice constant of the pillar array, we successfully controlled the QD number coupled to the fiber core. Such SPSs provided the highly pure single photon generation with a long-term stability. We expect that our SPS based on the QD pillar array directly coupled to a fiber can be implemented for the present optical-fiber network.

Academic Significance and Societal Importance of the Research Achievements

現在の情報通信における暗号通信方式は、解読に要する膨大な計算コストにより安全性が確保されているが、量子コンピュータに代表される新奇の計算技術・解読アルゴリズムの出現により必ずしも安全とは言い難い。これに対し量子暗号通信は、量子力学的な現象である観測による波束の収縮を用いるので、原理的にありとあらゆる盗聴が検知可能であり情報通信の恒久的な安全性を保証する。光子による量子暗号通信では純度の高い単一光子の生成が成功の鍵となるが、本研究では単一光子を高純度且つ長期間安定的に生成することに成功しており、量子情報通信の根幹をなす量子の安定的供給に大いに寄与する研究成果となっている。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (11 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Fiber-coupled pillar array as a highly pure and stable single-photon source2017

    • Author(s)
      S. Odashima, H. Sasakura, H. Nakajima, H. Kumano
    • Journal Title

      Journal of Applied Physics

      Volume: 122 Issue: 22 Pages: 223104-223104

    • DOI

      10.1063/1.4995225

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 光ファイバー接続型量子ドットを用いた高純度単一光子状態の生成2019

    • Author(s)
      笹倉弘理, 小田島聡
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Directional single photon emitter made by semiconductor quantum dots with a metal reflector2019

    • Author(s)
      S. Odashima, H. Sasakura
    • Organizer
      The 20th RIES-Hokudai International Symposium
    • Related Report
      2019 Annual Research Report
  • [Presentation] Semiconductor single photon source with a metal reflector2019

    • Author(s)
      S. Odashima, H. Sasakura, Y. Matsuo
    • Organizer
      International Symposium of RIES & CEFMS
    • Related Report
      2019 Annual Research Report
  • [Presentation] 単一量子ドット物性の歪みチューニングに向けたデバイスの作製と評価2019

    • Author(s)
      石田太郎, 鍜治怜奈, 小田島聡, 足立智
    • Organizer
      第54回応用物理学会北海道支部会
    • Related Report
      2018 Research-status Report
  • [Presentation] 単一量子ドットでの正孔g因子の歪みチューニングに向けたデバイスの作製と評価2019

    • Author(s)
      石田太郎, 松崎亮典, 鍜治怜奈, 小田島聡, 海住英生, 西井準治, 足立智
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Semiconductor quantum dot nano-array as a single-photon source directly coupled to a fiber2018

    • Author(s)
      S. Odashima, H. Sasakura, H. Kumano, H. Nakajima
    • Organizer
      European Advanced Materials Congress (EAMC2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Fiber array coupled semiconductor quantum dots for single photon emitter2018

    • Author(s)
      Y. Suzuki, S. Odashima, S. Kamono, K. Oomiya, H. Sasakura
    • Organizer
      第37回電子材料シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] Single photon emission by a quantum dots coupled fiber array2018

    • Author(s)
      S. Odashima, H. Sasakura, Y. Suzuki, S. Kamono, K. Oomiya, Y. Matsuo
    • Organizer
      The 19th RIES-HOKUDAI International Symposium
    • Related Report
      2018 Research-status Report
  • [Presentation] ピラー型微細形状を有するQDinFアレイを用いた光子数状態の生成2018

    • Author(s)
      笹倉弘理、小田島聡、大宮寛太、熊野英和
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Discrimination of exciton complexes in quantum-dot-in-fiber by photon correlations2017

    • Author(s)
      H. Sasakura, S. Odashima, H. Nakajima, H. Kumano
    • Organizer
      International Conference on Optics of Excitons in Confined Systems
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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