Spectral and Temperature Dynamics of Photon Absorption in Monatomic Transition Metal Dichalcogenides

This study delves into the interband absorption dynamics of polarized radiation in monatomic layers of transition metal dichalcogenides (TMDs), a field critical to advancing nano- and optoelectronics. Using theoretical modeling and computational analysis, the spectral and temperature dependencies of one- and two-photon absorption coefficients were examined for linearly and circularly polarized light. Results reveal a pronounced increase in absorption coefficients with frequency, reaching a peak before declining, a behavior modulated by the material's bandgap and temperature. The analysis further highlights the substantial impact of light polarization on absorption characteristics, with temperature-dependent shifts in the maximum absorption frequency. These findings contribute to a deeper understanding of the optical properties of 2D TMD materials and pave the way for their application in designing efficient photodetectors, light-emitting diodes, and other next-generation optoelectronic devices.