Can I ask how I can plot the efficiency in % of the metalens versus the wavelength band?
If you use broadband source, the transmission you get from a monitor is a function of wavelength. You can define your own efficiency and calculate from the transmission or E/H fields or Poyinting vector from the monitor, which are function of wavelength by default. Please first check your monitor and make sure it records data in the wavelength range.
you can modify the frequency points to the value you desire.
Ansys customers with active commercial software licenses can access the customer portal and submit support questions. You will need your active account number to register.