| Project/Area Number |
21H01011
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2022: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2021: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Keywords | Quantum Optics / Nanophotonics / Single Atom Tweezer / Nanofiber Cavity QED / Quantum Photonics / Quantum Information / Optical Nanofiber / Cavity QED |
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| Outline of Research at the Start |
The purpose of this research is to optically interface an array of single atoms by trapping them in the vicinity of a nanofiber (subwavelength diameter waist of a tapered optical fiber). We will implement such a platform for controlling the generation and propagation of fiber guided single photons.
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| Outline of Final Research Achievements |
In this project, we have aimed to trap an array of single atoms on a nanofiber or nanofiber cavity. We have demonstrated fabrication of photonic crystal cavities on a 300 nm diameter nanofiber using femtosecond laser. This diameter is crucial for trapping single atoms on nanofiber using optical tweezers. We have developed an experimental apparatus equipped with acousto-optic deflector driven by multiple RF-tones to create a 1-D array of tweezers. We have demonstrated trapping and imaging of single atoms in an array of tweezers in free-space.
In a different approach, we have demonstrated strong plasmonic enhancement of spontaneous emission on nanofiber leading to bright and polarized single photon emission into fiber-guided modes.
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| Academic Significance and Societal Importance of the Research Achievements |
量子コンピュータと量子情報技術の研究は進んでおり、近い将来、社会的、学術的に大きな影響を与える可能性があります。そのため、単一原子と単一光子を制御するための新しい技術の開発が不可欠です。このプロジェクトでは、光ピンセットを使用してナノファイバー上の単一原子アレイをトラップすることを目指しました。自由空間での単一原子アレイのトラップとイメージングを実証しました。この単一原子アレイをナノファイバーと組み合わせることで、ファイバー誘導単一光子を制御するための新しいプラットフォームが可能になり、量子ネットワークに使用できます。
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