Solving waveguide mode
When using the mode solver associated with OptiFDTD, there are ADI and FD Anlso methods. Can anyone suggest when to use ADI and when to use FD Anlso? My situation is that the waveguide is quite small (width: 450 nm x height: 220 nm). The input light wavelength is 1550 nm. There is always no mode found when using ADI method. When I use FD Anlso method, I found that there is one mode by setting the Eigenvalue Solver to Subspace Iteration. However, I am just doing try and error and not sure whether the mode is correct or wrong. Can anyone suggest what are those properties? Thanks!
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