I have been trying to simulate the diffraction efficiency(y-axis) versus wavelength (x-axis) for a blazed grating in Lumerical. I built the structure as a simple blazed grating made of Aluminium. I have placed the 'grating_transmission' analysis group in front of the grating. I can't seem to analyze the results properly. I am not able to get the option of finding the plot of efficiency. My next step would be to optimise the grating for a higher efficiency by changing the blaze angle.
There is this link : https://optics.ansys.com/hc/en-us/articles/360041613174-Blazed-grating in the learning forum but I can't seem to download the script file. Could someone advise on how to complete the simulation?