I am looking for a free software for students or generally make free to make a numerical study which means to simulate solar cells gratings in order to enhance solar cell efficiency by light trapping
If you haven't read it already, you may find the history behind stealth technology inspiring. The Wikipedia article doesn't specifically mention this, but Russian physicist Pyotr Ufimtsev found a solution to the diffraction equation that seemed to be useless (a null result). It took some time before the real value became evident. Also, have you seen the butterfly wings that appear blue but aren't? Who knows? You may find something that proves to be equally remarkable.