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Quantum State Generation of THz-Light and Exploration of Quantum Measurement Applications

Research Project

Project/Area Number 21H03747
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 80040:Quantum beam science-related
Research InstitutionIshinomaki Senshu University (2022-2023)
Institute of Physical and Chemical Research (2021)

Principal Investigator

NOTAKE TAKASHI  石巻専修大学, 理工学部, 准教授 (70413995)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2023: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywordsテラヘルツ電磁波 / 量子 / 量子光学 / テラへルツ光 / テラヘルツ光 / 量子状態 / 量子干渉 / 量子計測 / テラヘルツ
Outline of Research at the Start

従来の光量子応用のためには単一光子検出器が必須であるが、現状、テラヘルツ光を単一光子検出する技術は存在しない。我々は、可視光ポンプ強度を光子レベルまで下げた低ゲイン領域において、室温熱輻射に基づく熱光子を種光とする自発的パラメトリック過程により、量子相関を有するテラヘルツ光(シグナル光)と可視光(アイドラ光)の光子対を発生させる。そして量子干渉効果を通じて可視光光子のみを市販の高感度半導体検出器で光子検出する事で、テラヘルツ光子の量子状態生成を検証し、更には分光やイメージング等のテラヘルツ量子計測応用への端緒を切り開く。

Outline of Final Research Achievements

Recent quantum research has advanced the quest for the ultimate measurement and has begun to demonstrate that the limits of classical measurement can be broken by extending the interference of light using non-linear optical effects to quantum states.
In the terahertz frequency range, photon detection is in principle difficult because the photon energy is so weak that it corresponds to room temperature thermal fluctuations.To overcome this difficulty, we have attempted to detect ultra-sensitive THz-wave photons using a backward THz-wave parametric oscillation process. Two independent PPLN crystals are used to achieve a quantum conversion with photon energies differing by a factor of 1000.The highly efficient conversion of 300 GHz sub-THz photons into near-infrared photons with a wavelength of 1 um has led to successful detection of terahertz electromagnetic waves at the photon level.

Academic Significance and Societal Importance of the Research Achievements

光の量子力学的性質を利用した研究は、光子エネルギーの大きな可視光や近赤外光領域においてのみ進展してきた。この理由は可視光や近赤外光であれば光子エネルギーが大きく、半導体検出器などで容易に光子レベルの超高感度検出が可能となるためである。
可視光領域に比べて光子エネルギーが1000分の1程度のテラヘルツ電磁波に対する量子研究は、光子検出の困難さから進展が非常に立ち遅れている。本研究において、後進パラメトリック過程によりテラヘルツ電磁波を可視光へと高効率に変換することで光子レベルのサブテラヘルツ電磁波検出が可能である事が実証でき、テラヘルツ光子の量子的理解の深化が今後大いに進展する事が期待できる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (15 results)

All 2024 2023 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 5 results) Book (1 results)

  • [Journal Article] High-repetition-rate injection-seeded terahertz-wave parametric generation pumped by a 1.5 μm sub-nanosecond laser2024

    • Author(s)
      Nishida Mio、Notake Takashi、Takida Yuma、Hirosawa Kenichi、Ohata Nobuo、Minamide Hiroaki
    • Journal Title

      Applied Physics Letters

      Volume: 124 Issue: 12 Pages: 121105-121105

    • DOI

      10.1063/5.0192587

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cascaded parametric down-conversion on backward terahertz-wave parametric oscillation2022

    • Author(s)
      縄田 耕二、瀧田 佑馬、野竹 孝志、南出 泰亜
    • Journal Title

      Oyo Buturi

      Volume: 91 Issue: 1 Pages: 32-36

    • DOI

      10.11470/oubutsu.91.1_32

    • NAID

      130008138615

    • ISSN
      0369-8009, 2188-2290
    • Year and Date
      2022-01-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optical up-conversion-based cross-correlation for characterization of sub-nanosecond terahertz-wave pulses2022

    • Author(s)
      Takida Yuma、Nawata Kouji、Notake Takashi、Otsuji Taiichi、Minamide Hiroaki
    • Journal Title

      Optics Express

      Volume: 30 Issue: 7 Pages: 11217-11227

    • DOI

      10.1364/oe.452310

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] バックワード・テラヘルツ波パラメトリック発振の研究と非破壊検査応用2022

    • Author(s)
      南出泰亜、縄田耕二、瀧田佑馬、野竹孝志
    • Journal Title

      レーザー研究

      Volume: 50 Pages: 172-177

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamical visualization of anisotropic electromagnetic re-emissions from a single metal micro-helix at THz frequencies2020

    • Author(s)
      T. Notake, *T. Iyoda, T. Arikawa, *K. Tanaka, C. Otani, *H. Minamide
    • Journal Title

      Sci. Rep.

      Volume: 11 Issue: 1 Pages: 3310-3310

    • DOI

      10.1038/s41598-020-80510-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 非線形光学結晶によるテラヘルツ電磁波の発生と検出2024

    • Author(s)
      野竹孝志
    • Organizer
      核融合科学研究所研究会「ギガヘルツ・テラヘルツ帯電磁波の生成と計測およびプラズマ加熱への適用」
    • Related Report
      2023 Annual Research Report
  • [Presentation] 1.5-μm Laser-Pumped Injection-Seeded Terahertz-Wave Parametric Generator With 0.14-mW Average Output Power2023

    • Author(s)
      Yuma Takida, Mio Nishida, Takashi Notake, Kenichi Hirosawa, Nobuo Ohata, Hiroaki Minamide
    • Organizer
      The 12th Asia-Pacific Laser Symposium
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ultra-sensitive detection of sub-THz electromagnetic-waves using backward-wave parametric process2022

    • Author(s)
      Takashi Notake, Michihiro Kitanaka, Kouji Nawata, Yuma Takida, Hiroaki Minamide
    • Organizer
      The 11th Advanced Lasers and Photon Sources
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optical Up-Conversion-Based Cross-Correlation of Terahertz-Wave Pulses2022

    • Author(s)
      Yuma Takida, Kouji Nawata,Takashi Notake, Taiichi Otsuji, Hiroaki Minamide,
    • Organizer
      CLEO2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Injection-seeded backward terahertz-wave parametric oscillators at 0.3 and 0.5 THz bands for nondestructive imaging applications2022

    • Author(s)
      Yuma Takida, Kouji Nawata,Takashi Notake, Hiroaki Minamide,
    • Organizer
      SPIE Photonics Europe 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] High-dynamic-range nondestructive testing promoted by 200 W peak-power backward terahertz-wave parametric oscillator2022

    • Author(s)
      Kouji Nawata, Yuma Takida, Takashi Notake, Hiroaki Minamide
    • Organizer
      CLEO-PR 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 1.5 μm帯レーザを用いた高繰り返し光注入型テラヘルツ波パラメトリック発生2022

    • Author(s)
      西田 美緒、野竹 孝志、廣澤 賢一、大畠 伸夫、瀧田 佑馬、南出 泰亜
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] KTP結晶を用いたサブナノ秒レーザー励起 テラヘルツ波パラメトリック発生2022

    • Author(s)
      瀧田 佑馬、縄田 耕二、野竹 孝志、WANG Yuye、南出 泰亜
    • Organizer
      The 69th JSAP Spring Meeting
    • Related Report
      2022 Annual Research Report
  • [Presentation] 後進波パラメトリック過程を用いた300 GHz帯電磁波の超高感度検出2021

    • Author(s)
      野竹孝志 北中道大 縄田耕二 瀧田佑馬 南出泰亜
    • Organizer
      電子情報通信学会
    • Related Report
      2021 Annual Research Report
  • [Book] テラヘルツ波産業創成の課題と展望 テラヘルツ波パラメトリック光源を用いたリアルタイム危険ガス検知2022

    • Author(s)
      縄田 耕二, 瀧田 佑馬, 野竹 孝志, 南出 泰亜
    • Total Pages
      317
    • Publisher
      シーエムシー出版
    • ISBN
      9784781316628
    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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