parallel polarization perpendicular polarization & popularized optical property

[gaurav1201]

 hi ,
 sir how  to calculate parallel polarization perpendicular polarization & unpolaraized optical property  like optical absorption refractive index Dielectric constant etc. through ATK DFT in vnl atk ??
paper that i follow from where i read is  ( Optical properties of hexagonal boron nanotubes by first-principles
calculations Sandeep Kumar Jain and Pankaj Srivastava)..
 please reply me for above query....

[Petr Khomyakov]

Please do search for this information in our online documentation at https://docs.quantumwise.com/, e.g., see https://docs.quantumwise.com/tutorials/optical/optical.html for optical spectrum calculations.