I’m currently researching on a nano-scale objects’ surface plasmon resonance when its on the substrate as a light shining on. However, I don’t know how to set the TFSF, scattering cross section, and the boundary condition correctly to obtain the result. Also, why does TFSF has a region unlike the plane wave? The simulation are indicated in the picture
In addition, when I was using the plane wave source with wavelength range to test the field enhancement result. I encountered 2 problems: 1. when I set different wavelength range, the field enhancement changes at every wavelength point, which is unphysical. 2. I follow the procedure to set the xy to periodic and z to PML, but the warning occurs?
Could someone help me figure it out? I will be very appreciated.