Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150403
Title: In-plane optical anisotropy in ReS2 flakes determined by angle-resolved polarized optical contrast spectroscopy
Authors: Wang, Ying Ying
Zhou, Jia Dong
Jiang, Jie
Yin, Ting Ting
Yin, Zhi Xiong
Liu, Zheng
Shen, Ze Xiang
Keywords: Science::Physics
Engineering::Materials
Issue Date: 2019
Source: Wang, Y. Y., Zhou, J. D., Jiang, J., Yin, T. T., Yin, Z. X., Liu, Z. & Shen, Z. X. (2019). In-plane optical anisotropy in ReS2 flakes determined by angle-resolved polarized optical contrast spectroscopy. Nanoscale, 11(42), 20199-20205. https://dx.doi.org/10.1039/c9nr07502j
Project: RG103/16
RG195/17
MOE 2016-T3-1-006 (S)
MOE 2015-T2-2-007
MOE 2015-T2-2- 043
MOE 2017-T2-2-136
MOE 2018-T3-1-002
Journal: Nanoscale
Abstract: Various in-plane anisotropic properties are observed for the layered semiconducting transition metal dichalcogenide (TMD), rhenium disulfide (ReS2) due to its reduced symmetry. The understanding of these unique anisotropic behaviors in ReS2 will promote its applications in optoelectronics. In this work, angle-resolved polarized optical contrast spectroscopy has proved to be an efficient, quantitative, and non-destructive method to probe the optical anisotropy in ReS2 flakes with different thicknesses. The contrast value of ReS2 displays the maximum intensity when the polarization of incident light is along the Re–Re chain direction, while the contrast shows the minimum value when the polarization is perpendicular. An empirical equation for in-plane anisotropic refractive index calculation has been proposed and the angle-resolved polarized optical contrasts of 1–3-layer ReS2 are calculated. The calculation results show good agreements with the experimental observations. This indicates that the proposed equation is indeed appropriate for the quantitative understanding of birefringence and dichroism in ReS2 flakes. Our results not only shed light on the identification of crystal axes in anisotropic materials by using angle-resolved polarized contrast spectroscopy, but also provide quantitative information about anisotropy in anisotropic materials such as ReS2.
URI: https://hdl.handle.net/10356/150403
ISSN: 2040-3364
DOI: 10.1039/c9nr07502j
Rights: © 2019 The Royal Society of Chemistry. All rights reserved. This paper was published in Nanoscale and is made available with permission of The Royal Society of Chemistry.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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