Dear, Now I am working hard on the calculation of optical property of Graphene by using the the optical module of siesta. But I don't quite understand the parameter----'Optical.PolarizationType＆ Optical.Vector': "*Optical.PolarizationType (string): *This option has three possible values that represent the type of polarization to be used in the calculation. The options are polarized, which implies the application of an electric field in a given direction, unpolarized, which implies the propagation of light in a given direction, and polycrystal. In the case of the first two options a direction in space must be specified for the electric field or propagation using the Optical.Vector data block. Default value: polycrystal *Optical.Vector (data block):* This block contains 3 numbers that specify the vector direction for either the electric field or light propagation, for a polarized or unpolarized calculation,respectively. A typical block might look like: %block Optical.Vector 1.0 0.0 0.5 %endblock Optical.Vector"
1,if I set 'Optical.PolarizationType polarized',How should make sure the direction of wave propagation? For instance,if I set 'Optical.Vector': %block Optical.Vector 1.0 0.0 0.0 %endblock Optical.Vector" what is the direction of wave propagation?y direction or z direction or a direction just parallel to y_z plane? 2,To be more specific, If I put monolayer of graphene in the x_y plane, and I want a polarized TE wave vertically incident on graphene plane,ie the propagation of TE wave is parallel to z direction,How should I set ' Optical.PolarizationType＆Optical.Vector or other parameters' ? What about TM wave incidence? I am looking forward from you! BEST WISHES!
