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January 31, 2019 at 8:55 am
#50424
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Malik,
You make the design, you know the location of the waveguide so set the center of the source to match the location of your waveguide. For width, either use a rectangular field larger than the waveguide or perhaps a Gaussian that is roughly the size of the waveguide. Again you built the design and therefore know that the waveguide is roughly the width of the lattice constant.
Scott
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