non-diffracting beams

[kanikashh]

Can I use meep for generating non-diffracting beams of various kinds and study their interaction with matter. I am new to numerical simulation techniques so I,m not able to find the right tool.

[oskooi]

It is possible to simulate non-diffracting beams using Meep although currently there is no built-in feature that supports this. A Bessel beam mode source would be a nice feature to have similar to a Gaussian beam. Adding this feature would involve using the principle of equivalence which is described in Section 4.2 of our book chapter. As an example, this paper describes an approach specific to FDTD.