Guilin Sun
Ansys Employee

Hi Alberto, Lumerical products such as FDTD allow users to try a month for free. But we do not have student version and the software is not free.  If after trial you think it is a good fit for your project, I would strongly suggest you to report to your supervisor who will purchase a license for you. As you know the simulation software is your tool to do your project. 

In the mean time you can post your questions in this forum while you have a valid license (trial or purchased) and we'd be happy to help you.