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Entanglement photon pair source by using a micro Si ring

Research Project

Project/Area Number 17K05091
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Optical engineering, Photon science
Research InstitutionNational Institute of Information and Communications Technology

Principal Investigator

Fujiwara Mikio  国立研究開発法人情報通信研究機構, 未来ICT研究所量子ICT先端開発センター, 研究マネージャー (70359066)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords量子もつれ / シリコンリング / time-bin / Cバンド / 量子エレクトロニクス / 量子もつれ光源 / 四光波混合 / パラメトリックダウンコンバージョン / シリコンリング共振器 / time-bin entanglement / 通信波長帯 / シリコンフォトニクス / 量子鍵配送
Outline of Final Research Achievements

We report a time-bin entangled photon pair source in telecom wavelength using a 10 μm radius Si ring resonator which has two input ports and two drop ports. We demonstrate entangled photon pair generation from two drop ports simultaneously by pumping two input ports simultaneously, and furthermore observe four wave mixing enhancement via this double-port pumping. Owing to the resonator structure, four wave mixing pumped by a continuous laser is enhanced and double time-bin entangled photon pairs are generated in the telecom C-band. The visibilities clearly exceed the classical limit and moreover the count rates are doubled compared to the single-port pumping.

Academic Significance and Societal Importance of the Research Achievements

量子光回路の小型化にはシリコンでの光学回路の実現が有望である.我々は小型のシリコンリング共振器1つで,2組の量子もつれの生成に成功した.またCバンド内で2組の量子もつれの生成にも成功している.また,動作温度を変化させることにより,波長の微調整も可能であることを実証した.この成果は量子もつれを用いた量子暗号装置の小型化や,シリコンフォトニクスを用いた光量子回路に貢献できる可能性がある.シリコンフォトニクスは超伝導材料との親和性も高く,単一光子検出器との集積化も期待できる.

Report

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

    (6 results)

All 2019 2018 2017

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

  • [Journal Article] Optimal conditions for the Bell test using spontaneous parametric down-conversion sources2018

    • Author(s)
      Y. Tsujimoto, K. Wakui, M. Fujiwara, K. Hayasaka, S. Miki. H. Terai, M. Sasaki, and M. Takeoka
    • Journal Title

      Physical Review A

      Volume: 98 Issue: 6 Pages: 063842-063842

    • DOI

      10.1103/physreva.98.063842

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Wavelength division multiplexed and double-port pumped time-bin entangled photon pair generation using Si ring resonator2017

    • Author(s)
      M. Fujiwara, Ryota Wakabayashi, Masahide Sasaki, and Masahiro Takeoka
    • Journal Title

      Optics Express

      Volume: 25 Issue: 4 Pages: 3445-3453

    • DOI

      10.1364/oe.25.003445

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] n optimal strategy to recover nonlocality of polarization-entangled state from a SPDC source via entanglement swapping relay2019

    • Author(s)
      逵本吉朗,Chenglong You,和久井健太郎,藤原幹生,早坂和弘,三木茂人,寺井弘高,佐々木雅英,Jonathan P. Dowling,武岡正裕
    • Organizer
      CLEO/Europe-EQEC
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Frequency-domain Linear Interferometer with Spectrally Shaped Photons2019

    • Author(s)
      保坂有杜,富田雅也,逵本吉朗,新村星太郎,大見聡仁,和久井健太郎,藤原幹生,鹿野豊,武岡正裕,神成文彦
    • Organizer
      CLEO/Europe-EQEC
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hong-Ou-Mandel Interference between Photons Encoded with Orthogonal Spectr2019

    • Author(s)
      保坂有杜,富田雅也,逵本吉朗,新村星太郎,大見聡仁,和久井健太郎,藤原幹生,鹿野豊,武岡正裕,神成文彦
    • Organizer
      The 8th Advanced Lasers and Photon Sources
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Double-port pumped time-bin entangled photon pair generation using Si ring resonator2017

    • Author(s)
      Mikio Fujiwara, Ryota Wakabayashi, Masahide Sasaki, and Masahiro Takeoka
    • Organizer
      QCrypt 2017
    • 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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