fdtd metamaterial

Perhaps, but you might want to narrow down your question a bit.
Do you look for code? enlightenment? interesting papers? a list of methods?
a general overview of methods? help with programming? using commercial software?
etc.

see:

www.lumerical.com/

I need some Codes. or a paper which help me on writing codes.
thanks

Papers I might be able to help you with. But since there are thousands of papers on this topic
you would need to be a little bit more exact in stating what you need. (There are no rules on
edaboard against giving details.)