I designed a full metalens at (lambda design =532 nm). and I would like to see the normalized intensity distribution at different incident wavelengths (i.e 405 nm, 660 nm). so I set the plane wave source in the first case (start wavelength=stop wavelength=405nm) and in the second case (start wavelength= stop wavelength=660nm). because I don't know if I set the plane wave source ( start wavelength=400, and stop wavelength =700nm), how I can take the respective wavelength and find out the normalized intensity distribution at that wavelength from that range (for example at 405nm and 660 nm).
So if my first suggestion is correct I will do that. if not, could I ask for any recommendation to take the respective wavelength and find out the normalized intensity distribution at that wavelength from the wavelength span?.