▎ 摘　　要

We study the effects of Rashba spin-orbit coupling on thermodynamics properties and the effect of substrate and laser field radiation frequency on optical absorption coefficient of doped graphene under laser field irradiation. The variational method of Lee-Low-Pines and Devreese, Huybrechts, and Lemmens (DHL) formalism are used to obtain ground state energy and optical absorption coefficient, respectively. It is found that when the laser field radiation frequency and laser amplitude increase the optical absorption increases and decreases when the internal distance of polar substrate increases, obviously the peak tends to reduce. The entropy decreases and reaches its lowest values in particular with h-BN substrate. For high values of Rashba parameter and laser frequency the entropy exhibits saturation. Thus, the presence of the Rashba parameter reduces disorder, improves coherence and stability in graphene. These results offer the possibility to tune the thermodynamics parameters and optical absorption coefficient through the external parameters.