Local field enhancement close to a metallic rod
We will setup computational volume with a metallic rod in the center, illuminate it by a plane wave and we will observe local field enhancement at the side of metallic rod. Realistic metal model will be used for the rod treatment, representing silver. This is a model similar to what is used in application example for plasmonic nano-antennas.
What can be tested:
Setup all this with XSvit
Note that some of the screenshots might be from an older version of XSvit.
Start the XSvit application and setup the computational volume in this way:
We refer to basic appplication use example for details how to adjust all these settings.
After setting all this the complete setup should look like this
Then we can save all files and run the computation. As a result we get time dependence on the summed electric field; we can see that during the computation this value converges to some oscillatory behavior. When we run similar computation for different wavelengths and then plot the average of converged sum values over a period together into a spectral plot, we can see the spectral dependence of the field enhancement in nanorod neighbourhood (three such spectra are shown here for different rod lengths).
(c) Petr Klapetek, 2013