[Pw_forum] optical properties

[Sohail Ahmad]

Dear All
I wish to calculate optical properties of mono layer of Transition metal di chalcogenides.
I believe i have to use TDDFPT
i successfully used epsilon.x to calculate imaginary and real part of dielectric function.
My question is 
how to calculate refractive index, Refelectivity, Absorption coefficient etc ?
can anybody send me the link mentioning step by step or any one would like to share his experience >

Best Wishes
Sohail 
King Khalid University
Saudi Arabia