| 研究課題/領域番号 |
23K04617
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| 研究種目 |
基盤研究(C)
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| 配分区分 | 基金 |
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| 応募区分 | 一般 |
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| 審査区分 |
小区分30020:光工学および光量子科学関連
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| 研究機関 | 沖縄科学技術大学院大学 |
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研究代表者 |
LI SHILONG 沖縄科学技術大学院大学, 量子技術のための光・物質相互作用ユニット, 客員研究員 (60910403)
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| 研究期間 (年度) |
2023-04-01 – 2026-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
4,810千円 (直接経費: 3,700千円、間接経費: 1,110千円)
2025年度: 1,040千円 (直接経費: 800千円、間接経費: 240千円)
2024年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
2023年度: 2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
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| キーワード | Nanofiber / Microcavity / NV- center / Magnetometer / Quantum sensing / Nanomagnetometer / Fiber optics / Whirring gallery mode / Nanocapillary |
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| 研究開始時の研究の概要 |
A whispering-gallery-mode (WGM) microcavity-enhanced magnetometer consisting of single negatively charged nitrogen-vacancy (NV) centers in diamond coupled to a nanocapillary microcavity will be developed in this project. Compared to other WGM microcavity-based or nanofiber-based magnetometers, the proposed nanocapillary magnetometer has a higher sensitivity in a lab-on-a-fiber manner, facilitating novel applications in nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI).
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| 研究実績の概要 |
This project aims to establish a nanofiber-based whispering-gallery-mode (WGM) microcavity-enhanced magnetometer integrated with single negatively charged nitrogen-vacancy (NV-) centers. During the first fiscal year, we obtained the necessary equipment and laboratory consumables to build individual components that finally constituted the proposed magnetometer.
1. Fabrication of the nanofiber and the WGM microcavity was completed.
2. Recipe to clean and functionalize NV- nanodiamonds for better isolation and good signal-to-noise ratio was developed.
3. All the components to build the all-fiber magnetometer as proposed were assembled.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
1. Optical nanofibers and hollow-core WGM microcavities with the desired parameters were fabricated and characterized using scanning electron microscopy and X-ray photogrammetry.
2. Nanodiamonds containing single NV- centers were isolated from graphite-covered diamond powder. Presence of single NV- centers was confirmed by second-order correlation measurements.
3. On-demand coupling of single NV- nanodiamonds to the optical nanofiber was performed by means of a pick-and-drop method with ~200-nm tungsten probes.
4. Assembly of the proposed magnetometer system was completed which consists of a single NV- nanodiamond, an optical nanofiber, and a hollow-core WGM microcavity. Zero-field optically detected magnetic field resonance signal with a contrast of 12% was achieved.
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| 今後の研究の推進方策 |
1. Modeling of field interactions in the proposed multiphysical magnetometer system will be done.
2. Optimization of the photon coupling efficiency between different optical components will be done.
3. The performance of the detected magnetic field resonance of the magnetometer will be optimized.
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