Simulation and study opticals effects of graphene on different substares

[amanpreet]

I am new to this forum. Quantumwise is a nice simulation software and very informative too. I am just curious can we do epitaxially (layer by layer) grown nanodevice simulation on this. For e.g I want to study if we place a graphene layer on top of Si or Sic . How will it change the light absorption capacities and optical spectrum of graphene or silicon.One more question , how do we decide the sampling points.

[amanpreet]

Please can somebody help me in this?

[zh]

Before considering the optical properties of graphene on different substrates, it is more important and meaningful  to study what is the effect of substrate on the electronic structure of graphene. For such topic, you may check the literature.

For graphene, since it is a system with zero gap,  you may need a dense k-mesh for the k-point sampling.

[kstokbro]

I recommend that you try the tutorial
http://www.quantumwise.com/documents/tutorials/latest/SiliconOptical/index.html/
which gives an introduction to the calculation of optical properties with ATK