Fig. 8.

Optical properties of 2D Te. a Absorption coefficients of the bulk, few-layer, and monolayer β-Te. Adapted with permission from [24]. Copyright 2017, IOP Publishing. b, c Raman and angle-resolved Raman spectra of the 2D Te flakes. Adapted with permission from [25]. Copyright 2018, Nature Publishing Group. d, e Absorbance of 2 layer and 6-layer α-Te with the incident light polarization along the x-, y-, and z-direction. f Absorbance of incident light polarized in the direction for few-layer α- and bulk Te. Adapted with permission from [64]. Copyright 2018, Elsevier