How can i give the refractive index or dielectric constant of a sample on the line defect ( Where I will delete rods , it will be the plain path for light) which we are creating on the photonic crystal rod in air configuration in comsol. I believe that rod in air configuration rod having one refractive index and then to air.But when i want to give a refractive index of sample.. I m in doubt how can i give this value in comsol ?
this forum helps you. Good luck
https://www.comsol.com/community/forums/general/thread/1/
I did not understand your problem quite clearly. If I understood right, you are to proceed like this:
First create domain geometry like a sphere in 3D or circle in 2D and assign the medium (for you it is air) and then create your photonic crystal geometry with defect and holes whatever inside it. You can assign materials to this geometry as well as custom modify properties including refractive indices. You need not consider the sample as a whole with the defect. Rather just select each domains individually and assign respective properties/materials. While doing this, you need to ensure the outer domain, the holes, the defect, whatever the crystal doesn't occupy needs to be assigned as air. Hope that clears your doubt. Goodluck.
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