单层WS₂的激子结合能。
Exciton binding energy of monolayer WS₂.
作者信息
Zhu Bairen, Chen Xi, Cui Xiaodong
机构信息
Physics Department, University of Hong Kong, Hong Kong, China.
出版信息
Sci Rep. 2015 Mar 18;5:9218. doi: 10.1038/srep09218.
Abstract
The optical properties of monolayer transition metal dichalcogenides (TMDC) feature prominent excitonic natures. Here we report an experimental approach to measuring the exciton binding energy of monolayer WS₂ with linear differential transmission spectroscopy and two-photon photoluminescence excitation spectroscopy (TP-PLE). TP-PLE measurements show the exciton binding energy of 0.71 ± 0.01 eV around K valley in the Brillouin zone.
摘要
单层过渡金属二硫属化物（TMDC）的光学性质具有显著的激子特性。在此，我们报告一种通过线性微分透射光谱和双光子光致发光激发光谱（TP-PLE）测量单层WS₂激子结合能的实验方法。TP-PLE测量结果表明，在布里渊区K谷附近，激子结合能为0.71±0.01电子伏特。
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