| 研究課題/領域番号 |
21J11825
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| 研究機関 | 東京大学 |
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研究代表者 |
XING DI 東京大学, 工学系研究科, 特別研究員(DC2)
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| 研究期間 (年度) |
2021-04-28 – 2023-03-31
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| キーワード | Nanolaser / Perovskite / CsPbBr3 nanocrystals / single mode laser / plasmonic laser / plasmonic waveguide |
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| 研究実績の概要 |
First part, a self-healing lithographic patterning technique using perovskite CsPbBr3 nanocrystals is demonstrated to realize high-quality and high-crystallinity single-mode laser arrays. The self-healing process is compatible with the standard lithography process and greatly improves the quality of lithographic laser cavities. A single-mode microdisk laser array is demonstrated with a low threshold.
Second part, by embedding Ag NWs in NCs film, localized surface plasmon resonance (LSPR) supported random lasing is observed. When the pump light is focused on a single Ag NW, a NC-NW coupled plasmonic-waveguide laser with a much narrower emission peak is realized on a single Ag NW.
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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
First, we successfully developed a self-healing lithographic patterning technique using perovskite CsPbBr3 nanocrystals and demonstrated a large area perovskite single-mode laser arrays. The control of the lasing wavelength is made possible over a range of up to 6.4 nm by precise fabrication of the laser cavities.
Second, we observed LSPR-supported random lasing from Ag nanowire embedded CsPbBr3 nanocrystals film and achieved a plasmonic-waveguide laser with a much narrower emission peak (FWHM = 0.4 nm) by pumping a single Ag NW. By using the proposed QD-NW plasmonic-waveguide lasers, a dual-wavelength plasmonic nanolaser switch is realized by controlling the polarization direction of the emission light.
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| 今後の研究の推進方策 |
For the large area single-mode laser array, a plasmonic microdisk laser will be demonstrated by fabricating the cavities on Ag film. A waveguide coupled system will be also fabricated to guide the lasing mode in-plane.
For the LSPR supported laser, an ultralow threshold plasmonic lattice laser by using CsPbBr3 nanocrystals will be demonstrated. By adjusting the band structure to match the emission of CsPbBr3 nanocrystals, a controlled directional emission can be achieved.
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