Abstract
We propose a method to preliminarily determine the thicknesses of bulk MoS2 layers based on their colours. The reflectance spectra of thin-layer and bulk MoS2 on three substrates were calculated by using the finite-difference time-domain technique; then, based on chromaticity theory, the corresponding colour coordinates were obtained. By comparing the colours of the experimental sample and the corresponding structure, whose reflection spectrum was calculated, the thicknesses of bulk MoS2 layers were determined preliminarily, which laid the foundation for the accurate measurement of the thickness, subsequently, through methods based on atomic force microscopy, Raman spectroscopy, and other linear and nonlinear optical processes.
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