Electromagnetic field simulation applying COMSOL Multiphysics

In this video, Maxwell's equations were solved to calculate electromagnetic field distribution.
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[@mohamedmoumou6682]

Good day Sir, I am new to COMSOL. I want to model a point source from which Electric Field spreads out in x,y directions. I am working in 2D plane. I started of by creating a geometry with air, and then specified my point. How do I assign electric field to my point? Any help would be greatly appreciated. Regards

[@asmakhajooie]

is it possible that give 12kV voltage to the geometry that we have in this AC/DC module?

[@alexalex-ri8bm]

THANKS A LOT!!!!!!

[@LaserLab-qy7nx]

How to do SERS simulation using SEM or TEM images

[@LaserLab-qy7nx]

I saw in many research papers that they are doing FDTD simulations to explain their SERS results, how can we perform the FDTD simulation using COMSOL