Layer-number dependent reflection spectra of WS2 and WSe2 flakes on SiO2/Si substrate

Xiaoli Li; Xiaofen Qiao; Longlong Wang; Yafang Shi; Weifeng Zhang

doi:10.1117/12.2295111

12 January 2018 Layer-number dependent reflection spectra of WS₂ and WSe₂ flakes on SiO₂/Si substrate

Xiaoli Li, Xiaofen Qiao, Longlong Wang, Yafang Shi, Weifeng Zhang

Proceedings Volume 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 106210J (2018) https://doi.org/10.1117/12.2295111
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

Tremendous interest has recently focused on the layered TMDs. Layer number is one of the fundamental parameters in TMDs. In this paper, layer-number dependent reflectivity of WS₂ and WSe₂ flakes on SiO₂/Si substrate were measured by a simple and fast reflection spectrum probing technique. Characteristic excitonic peaks, A and B, and some higher energy density of states excitonic peaks were observed and their properties as a function of layer number were studied. Our results are in agreement with the previous reports.

Citation Download Citation

Xiaoli Li, Xiaofen Qiao, Longlong Wang, Yafang Shi, and Weifeng Zhang "Layer-number dependent reflection spectra of WS₂ and WSe₂ flakes on SiO₂/Si substrate", Proc. SPIE 10621, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 106210J (12 January 2018); https://doi.org/10.1117/12.2295111

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