Actually, I'm expecting answer to perform a computational program and its code related concept.
@Hany,
I know we need to use FDTD in MEEP. But I would like to know how to write the codes for that purpose.
Why don't you ask or search in the MEEP's maillist? MEEP has also quite a good documentation online. Not very much active community there, but chances finding your answer there is still much higher than here - on RG.
Modeling of metal structures (plasmonic effects) will require longer and deeper experience with MEEP. Do not expect that someone will provide you the correct working code for your application. You will have to invest some amount of time and efforts understanding what and why is going on. Examination of the code snippets, published in maillist along the questions, would be the best start.
Besides, there are 3 different programming languages that you can use with MEEP (ranking for the functionality and documentation) - Scheme (default interface), C++ (library with defined API) and python (3rd party wrapper). So you have at least define what you mean by "computational code" and start exploring which option fits best for you.
Good luck,
Python has a meep wrapper which should be human readable. Also, you may want to download Lumerical's FDTD solver, which has a free 30 day trial and is much easier to use.
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