| Project/Area Number |
21K13868
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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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 | National Institute for Materials Science |
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Principal Investigator |
KARANIKOLAS Vasileios 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, NIMSポスドク研究員 (50868320)
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| Project Period (FY) |
2021-04-01 – 2023-03-31
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| Project Status |
Discontinued (Fiscal Year 2022)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | Quantum light / Color centers / 2D materials / Quantum optics / Localized plasmons / Ultrafast operation / Ultrabright source / Purcell factor / Quantum materials / Surface plasmons / Nanoantenna / Nano-photonics |
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| Outline of Research at the Start |
Quantum light sources are slow and their signal is weak, limiting their functionality for future applications. Placing the quantum sources in a photonic cavity, we accelerate their operation and brightness. Novel theoretical and fabrication techniques are used to realize the photonic cavity.
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| Outline of Annual Research Achievements |
Carbon enriched hexagonal boron nitride (hBN) bulk crystal is exfoliated to hBN nanosheets on a Si/SiO2 substrate. We focus on the color-center (CC) emission peak at 804nm, which preserves its emission properties up to room temperatures while presenting a fast operation with a lifetime of 300ps.
Through numerical simulations we choose Ag triangle nanoparticles (NPs) that support a localized plasmon resonance at 800nm. We place them on top of a Si/SiO2 substrate.
We mechanically transfer a hBN nanosheet, of 30nm thickness, on top of the Ag nanoparticles. The near-field of the CCs excites the plasmon modes of the Ag NP. Then, the CCs lifetime is reduced from 300ps to below 50ps and the CC's signal is enhanced. Hence, the CC/Ag NP combined system presents an ultrafast and ultrabright operation.
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