Just for more clarification, I need to optimize the design to have maximum transmission at a single wavelength and minimum transmission elsewhere. Let's say the operating wavelength range is from 5 to 9 micron, I need to have maximum transmission at 8 and minimum transmission at other wavelengths. Can I do that test?

Also, when I pressed right click on the ''Optimization'', I noticed that the results are not stored as shown in the photo. Is that normal please?

Lastly, what is the difference between ''Maximum Generations'' and ''Generation size'' please?