Silicon nitride nanobeam enhanced emission from all-inorganic perovskite nanocrystals
Silicon nitride nanobeam enhanced emission from all-inorganic perovskite nanocrystals
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DOI：
10.1364/oe.27.018673
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发表时间：
2019-06-24
期刊：
影响因子：
3.8
通讯作者：
Xiong, Qihua
中科院分区：
文献类型：
--
作者：
Fong, Chee Fai;Yin, Yin;Xiong, Qihua
具有光学活性的钙钛矿纳米晶体在单光子源、发光二极管和纳米光子学等领域具有广阔的应用前景。将这些纳米晶体耦合到光子微米和纳米结构将提供额外的自由度来操纵它们的光学特性。在这里，我们证明了钙钛矿纳米晶体的耦合到一个机械稳健的，聚（甲基丙烯酸甲酯）（PMMA）封装的氮化硅纳米梁光子晶体腔在室温下。如从时间分辨光致发光衰减测量确定的，我们观察到从钙钛矿纳米晶体增强的自发发射的因子为1.4，与时域有限差分模拟一致。此外，通过改变PMMA层中钙钛矿晶体的浓度，可以修改该层的有效折射率，从而允许我们调谐腔模谐振。研究结果表明，可溶液加工的钙钛矿纳米晶在片上光源、光电子器件和光子集成电路等方面具有广阔的前景。(C)根据OSA开放获取出版协议的条款，2019年美国光学学会
Optically active perovskite nanocrystals have shown considerable promise for a myriad of applications, such as single photon source, light-emitting diodes and nanophotonics. Coupling those nanocrystals to photonic micro-and nanostructures will offer additional degrees of freedom to manipulate their optical properties. Herein, we demonstrate the coupling of perovskite nanocrystals to a mechanically robust, poly(methyl-methacrylate) (PMMA)-encapsulated silicon nitride nanobeam photonic crystal cavity at room temperature. As determined from the time-resolved photoluminescence decay measurements, we observed enhanced spontaneous emission from the perovskite nanocrystals by a factor of 1.4, consistent with finite difference time domain simulation. In addition, by varying the concentration of the perovskite nanocrystal in the PMMA layer, the effective index of the layer can be modified, allowing us to tune the cavity mode resonance. Our results show that solution-processable perovskite nanocrystals hold a promising prospect for applications such as on-chip light sources, optoelectronic devices and photonic integrated circuits. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement