| 研究課題/領域番号 |
23KF0107
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分21030:計測工学関連
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| 研究機関 | 東京大学 |
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研究代表者 |
J・J Delaunay 東京大学, 大学院工学系研究科(工学部), 准教授 (80376516)
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| 研究分担者 |
XING DI 東京大学, 大学院工学系研究科(工学部), 外国人特別研究員
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| 研究期間 (年度) |
2023-07-26 – 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 |
3,000千円 (直接経費: 3,000千円)
2025年度: 100千円 (直接経費: 100千円)
2024年度: 1,400千円 (直接経費: 1,400千円)
2023年度: 1,500千円 (直接経費: 1,500千円)
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| キーワード | metasurface / emission / polarization |
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| 研究開始時の研究の概要 |
An optical functional structure sustaining coherent chiral light emission at a low threshold of energy is proposed, fabricated, and characterized. The proposed structure is applied in a chiral detection scheme for use in chiral molecules pharmaceutical research.
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| 研究実績の概要 |
Structures that support a bound-state-in-the-continuum (BIC) lasing mode on a photonic crystal were designed by simulation. These structures made of dielectric materials were patterned into nanocylinder arrays to support a resonance mode with a high-quality factor (quasi-BIC mode). Solution-processed quantum dots (QDs) were integrated on top of the nanocylinder array to form an isolated cavity. Due to the existence of side edges, the lasing mode is better confined within the cavity and shows lower scattering losses in the lateral direction. In summary, a single-mode BIC laser using CsPbBr3 QDs having a narrow linewidth of around 0.1 nm and a small footprint (10 × 10 μm^2) was demonstrated. This lasing structure is the smallest among the existing solution-processed BIC laser.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Cavity structures supporting BIC lasing mode have been designed. Direct fabrication of well-defined patterns of quantum dots (QDs) via a solution process was proposed to take advantage of the pattern edges to reduce losses through the cavity edges. A miniaturized BIC laser (10 × 10 μm^2) with a low threshold has been demonstrated. The results were published in Advanced Functional Materials a leading journal in the field of nanotechnology.
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| 今後の研究の推進方策 |
We will break the symmetry of the employed nanostructures to produce a high Q factor chiral lasing emission. For this purpose, simulations and experimental verifications will be used to design and optimize the chiral structure. To characterize the experimental result, an angle-resolved spectrometer will be built. This setup can characterize the polarization properties of the far field emission in off normal direction. Finally, a chiral emission with a high Q factor will be demonstrated.
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