Hi, I wanted to do mode analysis of two coupled silicon waveguide separated with 200 nm with the dimension of 400 nm and thickness 0.215 nm. What should be the height and width of cladding? I also have prepared file for it, but results is not getting as expected.
Eşleştirilmiş aynı özelliklere sahip iki dalga kılavuzunun mod analizi enerji basamaklarındaki çift enerji düzeyine bağlıdır. (n=1,3,5...ve n=2,4,6)
Hi Kumar Neupane
Usually, the height of cladding and buried oxide (BOX) in silicon photonics is determined by the foundry and typically varies between 2 to 3 microns. To avoid any mode scattering, you can set the cladding and BOX height to 3 μm. Besides, you can use perfectly matched layers (PML) to reduce the reflection from boundaries.
I noticed that in your mph file, you haven't considered the silicon substrate. If your intention is to only study the waveguide modes, you can extend the BOX and cladding heights to any value larger than 5 times the maximum wavelength.
Please refer to the attached mph file where I have added a PML layer and made modifications to the geometrical parameters.
Thanks,
Aydin
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