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Subtract effective refractive indexes to find birefringence in a planar waveguide
Posted 27 mars 2014, 09:19 UTC−4 Version 4.3 0 Replies
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I am using the electromagnetic waves module to solve for modes in a square planar waveguide. The waveguide is single mode so I get two modes (TE and TM). I'm doing a parameteric sweep as well so I get pairs of values for each different geometry change. I can find the effective refractive indexs for both modes seperately but can't find a way to subract them to get the birefringence n(TM)-n(TE), which I want to plot.
I know its possible to export the data and do the subtraction offline but I would like to know if its possible to do it in Comsol by possibly subracting table columns or global variables.
Thanks for your help
Peter
Hello Peter Lerwick
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