| Project/Area Number |
23K26155
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| Project/Area Number (Other) |
23H01461 (2023)
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Multi-year Fund (2024)
Single-year Grants (2023) |
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| Section | 一般 |
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| Review Section |
Basic Section 21060:Electron device and electronic equipment-related
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
何 亜倫 国立研究開発法人物質・材料研究機構, 電子・光機能材料研究センター, 主任研究員 (20815386)
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| Co-Investigator(Kenkyū-buntansha) |
トン ヴィンセント 東京大学, 大学院工学系研究科(工学部), 教授 (50971628)
山原 弘靖 東京大学, 大学院工学系研究科(工学部), 特任准教授 (30725271)
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| Project Period (FY) |
2023-04-01 – 2026-03-31
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| Project Status |
Granted (Fiscal Year 2024)
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| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2025: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2024: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2023: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
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| Keywords | メタ表面 / 遷移金属ダイカルコゲナイ / 2次元材料 / ナノフォトニクス / メンブレン / BIC / Perovskites / Colloidal quantum dots / Nanolasers / 連続スペクトル中の束縛状態 / ペロブスカイト / コロイド量子ドット / ナノレーザー / ナノレーザ / メタサーフェス / 量子ドット / 光デバイス |
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| Outline of Research at the Start |
Our project proposes a nanophotonic laser design for 2D and QD materials, utilizing a low-dimensional material-coupled metasurface for bound states in the continuum (BIC) to achieve an ultra-high Q factor and significantly reduced radiation loss. This design incorporates high-quality, low-defect, wafer-scale low-dimensional materials that eliminate the need for transfer.
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| Outline of Annual Research Achievements |
Solution-processed laser devices, employing mediums like perovskite colloidal quantum dots (QDs), offer cost-effective options for various applications. CsPbX3 QDs, known for their high photoluminescence quantum yield and tunable emissions, hold promise for nanolasers.
In FY2023, an isolated CsPbBr3 QD cavity atop the TiO2 nanocylinder array has been investigated, enabling a QD cavity-supported laser via bound states in the continuum (BIC) providing strong light confinement. Unlike miniaturized BIC lasers using surrounded boundary photonic crystals, direct fabrication of well-defined QD patterns reduces losses without complex photonic crystal designs.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
In FY2023, a single-mode BIC laser utilizing CsPbBr3 QDs has been presented, boasting a narrow linewidth of approximately 0.1 nm. Contrasting with conventional QD slab-based BIC lasers, this proposed QD waveguide-BIC laser, supported by CsPbBr3 QD cavity, maintains a low lasing threshold even at small cavity sizes. Crucially, our design enables a miniaturized BIC laser with a device size as small as 10 × 10 um, the smallest among existing solution-processed QD BIC lasers. This study offers a pathway for developing ultra-compact BIC lasers using solution-processed QD gain media.
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| Strategy for Future Research Activity |
In FY 2024, we will demonstrate enhanced light-matter coupling by integrating low-dimensional materials with a membrane metasurface, leading to amplified and concentrated spontaneous emission from quasi-BIC-coupled low-dimensional gain materials. Notably, the membrane metasurface, suspended in air rather than positioned atop a substrate, will minimize radiation loss while enhancing light-matter interaction in the gain materials. This research introduces a nanophotonic platform for robust coupling of membrane metasurfaces with low-dimensional materials, offering new possibilities for developing low-dimensional material-based nanophotonic and quantum devices.
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