Does someone try to simulate rough layer in FDTD? I'm simulating the LED devices and trying to put some roughness on top of the devices (as typical is done in real devices). To check if my layer is rough enough, I'm going to examine the far-field radiation pattern. In principle for roughness material radiation should obey cosine law (lambertian pattern). That the idea. However, I don't want reinvent the wheel, so if you know about some paper or have some clue, could you share it with me, please? I would be very grateful.
We recently did some research on roughness on the end of a waveguide. We found that it is not only important to define the variation in the height of surface roughness but also it is important to define its autocorrelation length. Have a look at our paper
Optical Waveguide End Facet Roughness and Optical Coupling Loss
Hadi Baghsiahi, Kai Wang, Witold Kandulski, R.C.A. Pitwon, D.R. Selviah
Journal of Lightwave Technology 08/2013; 31(16):2659-2668
I am new user of FDTD. I have seen two types of FDTD one is lumeric FDTD and other is Opti FDTD . i want to investigate about Evanscent wave and i want to solve maxwells equations.... please give me some suggestions...some one suggest me to use Chirp Z transform...is it good???
The first suggestion is to do not write in post that is not relate to you question. I'm not sure what you want, however I'm working with MEEP. It's free software, so probably is perfect for starting do something with FDTD, but you need know a bit of coding. The Lumerical and OptiFDTD are comerciala and you need to be rich to have one. good luck