Dear Meep users, I am looking at the stability and convergence degree of MEEEP. I have looked at the computational cell, and also the resolution: I used the bend-waveguide code of the MEEP examples. There is a very good convergence b changing the computational cell from 16X32 to 96X192, and also a strong stability by changing g the resolution from 10 to 100 ( I know I really don't need that much of a high resolution).
Now I want to look at the PML thickness: however I am not sure how I should apply this change. Lets simplify the problem in this way that what is really the computational cell?!? Does it include the PML layer or not? If say the computational cell is fixed and I am changing the PML layer, PML layer might overlay the source and come more into the waveguide and so the whole are which the source is radiated in, gets smaller. Should I say the computational cell is the area the source is radiated in, (considering not having any geometry- in this example on MEEP page it is going to be (sx-PML)X(sy-PML)- ) PLUS PML layer thickness? In this way the computational cell which I define for MEEP is changing every time I change the PML thickness; does it count as computational cell change as well? If yes, which I don't really want it, how should I study the change of the PML thickness individually?! Should I define a very big computational cell at the beginning with a very large "padding" distance in order to prevent the PML layer to overlay the structure and source when it is set to it's maximum value of test?!? Thanks for your help, Asa Asa Asadollahbaik PhD Research Student Materials Research Group Room 2045, Building 25 University of Southampton Highfield Avenue Southampton SO17 1BJ Phone Number : +44 (0) 23 8059 8365
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