▎ 摘　　要

Ab-initio calculations based on density functional theory have been performed to study the optical properties of the Li intercalated graphene and MoS2. Comparative study of imaginary part of dielectric function for the Li doped, pristine graphene monolayer and their bulk counterparts has been done. The dielectric matrix has been calculated using the Quantum Espresso software package and its postprocessing code epsilon.x. The presented results show reliable qualitative description especially for computationally inexpensive calculation.