Photoluminescence enhancement and ultrafast relaxation dynamics in a low-dimensional heterostructure: effect of plasmon-exciton coupling
Photoluminescence enhancement and ultrafast relaxation dynamics in a low-dimensional heterostructure: effect of plasmon-exciton coupling
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DOI：
10.1364/ol.43.006093
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发表时间：
2018-12-15
期刊：
影响因子：
3.6
通讯作者：
Jiang, Tian
中科院分区：
文献类型：
--
作者：
Miao, Runlin;Zhang, Yiwen;Jiang, Tian
在这项工作中，我们对由单层（ML）二硫化钨（WS 2）和一维等离子体光子晶体（PPC）组成的低维异质结构进行了深入研究。利用稳态光致发光（PL）实验研究了掺和不掺PPC的WS2薄膜的光学性质。此外，角分辨反射率和PL显微镜测量用于确定ML WS2和1D PPC之间的耦合效应。此外，通过飞秒泵浦探测实验，新提出的异质结构的弛豫时间提取为0.74 ps和21.9 ps。重要的是，弛豫过程的基本机制也首次在混合动力学中被揭示出来，就我们所知。(c)2018美国光学学会
In this work, we present an in-depth study on a low-dimensional heterostructure comprising monolayer (ML) tungsten disulfide (WS2) and 1D plasmonic photonic crystal (PPC). Stable-state photoluminescence (PL) experiments are employed to study the optical properties of WS2 films with and without PPC. In addition, angle-resolved reflectance and PL microscopy measurements are used to identify the coupling effects between ML WS2 and 1D PPC. Furthermore, by means of femtosecond pump probe experiments, the relaxation time for the newly proposed heterostructure is extracted to be 0.74 ps and 21.9 ps. Importantly, the underlying mechanism of the relaxation processes is also revealed in the hybrid for the first time, to the best of our knowledge. (c) 2018 Optical Society of America