Generation of mutually-coherent single photons and the development of high-performance single-photon sources using N@C60

• Project/Area Number: 17K18743
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics and related fields
• Research Institution: Tohoku University
• Principal Investigator: EDAMATSU Keiichi 東北大学, 電気通信研究所, 教授 (10193997)
• Research Collaborator: SADGROVE Mark ; MITSUMORI Yasuyoshi ; KANEKO Toshiro
• Project Period (FY): 2017-06-30 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000); Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2017: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
• Keywords: 窒素内包フラーレン / フラーレン / 単一光子 / 量子光源 / 量子光学 / 原子内包フラーレン / 量子エレクトロニクス

Outline of Final Research Achievements

Along with the recent experimental progress on fundamental quantum physics and quantum info-communication technology, development of high-performance single-photon sources is demanded. In this project, we carried out exploratory research aiming at the generation of mutually-coherent single photons and the development of high-performance single-photon sources using hydrogen-atom endohedral C60 (N@C60) synthesized by the plasma ion irradiation method.
The research subjects are (1) search of single photon emission from N@C60 at room temperature, (2) development of confocal micro-spectrograph to observe single-photons at low temperature, and (3) development of an efficient coupling system between single photon emitters and optical nano-fiber.

Academic Significance and Societal Importance of the Research Achievements

研究期間内には企図したN@C60からの単一光子発光を確認することはできなかったが，本研究で開発した低温下単一光子分光測定システムや単一光子源とナノ光ファイバとの高効率結合に向けた研究成果は，今後の高効率単一光子源の開発や新たな単一光子発生系の研究を促し，基礎量子物理学や量子情報通信技術の実験的研究の発展に寄与するものである．

Research Products

• [Journal Article] Direct generation of frequency-bin entangled photons via two-period quasi-phase-matched parametric downconversion (2019)
  • Author(s): Kaneda Fumihiro、Suzuki Hirofumi、Shimizu Ryosuke、Edamatsu Keiichi
  • Journal Title: Optics Express Volume: 27 Issue: 2 Pages: 1416-1424
  • DOI: 10.1364/oe.27.001416
  • Peer Reviewed / Open Access
• [Journal Article] Demonstration of Displacement Sensing of a mg-Scale Pendulum for mm- and mg-Scale Gravity Measurements (2019)
  • Author(s): N. Matsumoto, S. B. Catano-Lopez, M. Sugawara, S. Suzuki, N. Abe, K. Komori, Y. Michimura, Y. Aso, and K. Edamatsu
  • Journal Title: Phys. Rev. Lett. Volume: 122 Issue: 7 Pages: 071101-071101
  • DOI: 10.1103/physrevlett.122.071101
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Effect of the depolarization field on coherent optical properties in semiconductor quantum dots (2018)
  • Author(s): Mitsumori Yasuyoshi、Watanabe Shunta、Asakura Kenta、Seki Keisuke、Edamatsu Keiichi、Akahane Kouichi、Yamamoto Naokatsu
  • Journal Title: Physical Review B Volume: 97 Issue: 23
  • DOI: 10.1103/physrevb.97.235305
  • Peer Reviewed
• [Journal Article] 非古典光の基礎 (2018)
  • Author(s): 枝松圭一
  • Journal Title: 光学 Volume: 47 Pages: 48-53
  • Peer Reviewed
• [Presentation] 室温下での金ナノロッド－量子ドット結合系からの発光光子の偏光測定 (2019)
  • Author(s): 菅原大和, Mark Sadgrove, 三森康義, 枝松圭一
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] ナノ光ファイバ近傍のエバネッセント場によるリポソームの輸送 (2019)
  • Author(s): 吉野峻晶, 山浦大地, 菅原大和, Mark Sadgrove, 平野愛弓, 三森康義, 枝松圭一
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] Deterministic measurement of nonlocal weak values for two-qubit systems (2019)
  • Author(s): VIDIL Pierre, 三森康義, SADGROVE Mark, 枝松圭一
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] 冷却機械振動子を用いた重力センサーの開発 (2019)
  • Author(s): 松本伸之, Seth B. Catano-Lopez, 金井天馬, 菅原大和, 鈴木聖也, 阿部尚文, 小森健太郎, 道村唯太, 麻生洋一, 枝松圭一
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] Development of a milligram-scale source mass for applications in mg-mm-scale gravity measurements (2019)
  • Author(s): Seth B. Catano-Lopez, Nobuyuki MatsumotoA, B, Tenma Kanai, Masakazu Sugawara, Seiya Suzuki, Naofumi Abe, Kentaro KomoriC, Yuta MichimuraC, Yoichi AsoD, Keiichi Edamatsu
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] ZnSe中の不純物中心に局在する励起子共鳴エネルギーのコヒーレント制御 (2019)
  • Author(s): 鈴木聖也, 三森康義, Mark Sadgrove, 枝松圭一, 小川佳宏
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] ZnSe不純物中心に局在する励起子四光波混合の減衰形状の励起強度依存性 (2019)
  • Author(s): 三森康義, 鈴木聖也, Mark Sadgrove, 枝松圭一, 小川佳宏
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] Quantum interference and wave-particle duality of dynamically unpolarized single photons (2018)
  • Author(s): Keiichi Edamatsu
  • Organizer: International Conference on Quantum Frontiers and Foundations
  • Int'l Joint Research / Invited
• [Presentation] ZnSe中の不純物中心に局在する励起子の四光波混合III (2018)
  • Author(s): 三森康義, 常盤圭佑, Mark Sadgrove, 枝松圭一, 小川佳宏
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] 無偏光単一光子源を用いた完全混合状態に対する誤差・擾乱の不確定性関係の検証 (2018)
  • Author(s): 阿部尚文，三森康義，Mark Sadgrove，枝松圭一
  • Organizer: 日本物理学会第73回年次大会
• [Presentation] Photoluminescence of Nitrogen-Atom Endohedral Fullerenes (N@C60) (2017)
  • Author(s): Seth B. Catano, Y. Mitsumori, M. Sadgrove, T. Kaneko, K. Edamatsu
  • Organizer: 日本物理学会2017年秋季大会
• [Presentation] ダイヤモンド単一NV中心を用いた動的無偏光単一光子発生 (2017)
  • Author(s): 阿部尚文，三森康義，Mark Sadgrove，枝松圭一
  • Organizer: 日本物理学会2017年秋季大会
• [Presentation] Nonlocal two-qubit measurement using spin products (2017)
  • Author(s): Keiichi Edamastsu
  • Organizer: 3rd International Conference Quantum Foundations
  • Int'l Joint Research / Invited
• [Presentation] Dynamically unpolarized single-photon source in diamond with intrinsic randomness (2017)
  • Author(s): Naofumi Abe, Yasuyoshi Mitsumori, Mark Sadgrove, Keiichi Edamatsu
  • Organizer: RIEC International Symposium on Photonics and Optical Communications
  • Int'l Joint Research
• [Presentation] Dynamically Unpolarized Single-Photon Source in Diamond with Intrinsic Randomnes (2017)
  • Author(s): Naofumi Abe, Yasuyoshi Mitsumori, Mark Sadgrove, Keiichi Edamatsu
  • Organizer: Japan Society of Applied Physics - Optical Society of America Joint Symposium 2017
  • Int'l Joint Research
• [Book] 単一光子と量子もつれ光子 (2018)
  • Author(s): 枝松 圭一
  • Total Pages: 168
  • Publisher: 共立出版
  • ISBN: 9784320035393