Effect of strain on exciton dynamics in monolayer WS2

被引：0
|
作者：
张璐 [1 ]
何大伟 [1 ]
何家琪 [1 ]
付洋 [1 ]
王永生 [1 ]
机构：
[1] Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology,Beijing Jiaotong University
来源：
Chinese Physics B | 2019年 / 28卷 / 08期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
transient absorption; transition metal dichalcogenides; excitons; strain;
D O I：
暂无
中图分类号：
O614.613 [];
学科分类号：
070301 ; 081704 ;
摘要：
The exciton dynamics in a WS2monolayer with strain are studied by transient absorption measurements. We measure the differential transmission signal from monolayer WS2as a function of the probe wavelength at different levels of strain applied to the sample. The differential transmission spectrum has a positive maximum value at about 614 nm and shows no significant strain dependence. By time-resolving the differential transmission signal, we find that the strain has a minimal effect on the exciton formation process. However, the exciton lifetime is significantly reduced by strain. These results provide useful information for applications of WS2in flexible electronic and optoelectronic devices where strain is inevitable.
引用
收藏
页码：310 / 314
页数：5
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