Metallic Nanowire Coupled CsPbBr3 Quantum Dots Plasmonic Nanolaser
Metallic Nanowire Coupled CsPbBr3 Quantum Dots Plasmonic Nanolaser
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DOI：
10.1002/adfm.202102375
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发表时间：
2021-04
影响因子：
19
通讯作者：
Di Xing;Cheng‐Chieh Lin;P. Won;R. Xiang;Tzu‐Pei Chen;A. S. A. Kamal-A.-S.-A.-Kamal-2231946606;Yang-Chun Lee;Y. Ho;
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文献类型：
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作者：
Di Xing;Cheng‐Chieh Lin;P. Won;R. Xiang;Tzu‐Pei Chen;A. S. A. Kamal-A.-S.-A.-Kamal-2231946606;Yang-Chun Lee;Y. Ho;
等离子体纳米激光器为扩展亚波长应用提供了宝贵的机会。由于片上集成的潜力，支持波导模式的基于半导体纳米线（NW）的等离子体纳米激光器引起了高度关注。迄今为止，基于钙钛矿量子点（QD）的等离子体激光器，特别是支持等离子体波导模式的纳米激光器，仍然是一个挑战，仍未得到探索。在此，报道了金属纳米线耦合 CsPbBr3 QD 等离子体波导激光器。通过将银纳米线嵌入量子点薄膜中，观察到从半峰全宽 (FWHM) 为 6.6 nm 的放大自发发射到局域表面等离子体共振 (LSPR) 支持的随机激光的演变。当泵浦光聚焦在单个Ag NW上时，在具有均匀聚乙烯吡咯烷酮层的单个Ag NW上实现了具有更窄发射峰（FWHM = 0.4 nm）的QD-NW耦合等离子体波导激光器。量子点充当增益介质，而银纳米线充当谐振腔并传播等离子体激光模式。此外，通过从不同方向泵浦两个银纳米线，实现了双波长激光开关。金属纳米线耦合量子点等离子体纳米激光器的演示将为超小型光源以及光物质相互作用的基础研究提供一种替代方法。
Plasmonic nanolasers provide a valuable opportunity for expanding sub‐wavelength applications. Due to the potential of on‐chip integration, semiconductor nanowire (NW)‐based plasmonic nanolasers that support the waveguide mode attract a high level of interest. To date, perovskite quantum dots (QDs) based plasmonic lasers, especially nanolasers that support plasmonic‐waveguide mode, are still a challenge and remain unexplored. Here, metallic NW coupled CsPbBr3 QDs plasmonic‐waveguide lasers are reported. By embedding Ag NWs in QDs film, an evolution from amplified spontaneous emission with a full width at half maximum (FWHM) of 6.6 nm to localized surface plasmon resonance (LSPR) supported random lasing is observed. When the pump light is focused on a single Ag NW, a QD‐NW coupled plasmonic‐waveguide laser with a much narrower emission peak (FWHM = 0.4 nm) is realized on a single Ag NW with the uniform polyvinylpyrrolidone layer. The QDs serve as the gain medium while the Ag NW serves as a resonant cavity and propagating plasmonic lasing modes. Furthermore, by pumping two Ag NWs with different directions, a dual‐wavelength lasing switch is realized. The demonstration of metallic NW coupled QDs plasmonic nanolaser would provide an alternative approach for ultrasmall light sources as well as fundamental studies of light matter interactions.