I want to simulate surface plasmon polariton modes for a 2D FDTD simulation in C Code. I read Sulivan Book, But plane wave isn't a good Source for Plasmonic excitation. Because all modes of Plasmon excite! So, we can not investigate frequency response of system. I need to excite just one mode of plasmon, How can we do it?
Thanks a lot
GHahri
There are two ways to do this. The first way is conceptually easier, but is actually the more complicated approach. You could simulate the actual structures that would be used to excite the plasmon like a prism or a grating. The second way is to calculate the plasmon mode and then use the total-field/scattered-field technique to launch the mode into your structure.
Everything you need to do this is in Lectures 20 and 21 here although here I discuss exciting waveguide modes. Fortunately, it is the same exact code to do both.
http://emlab.utep.edu/ee5390fdtd.htm
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