Gradient index profile in FDTD


#1

Hello,
I am looking for a gradient index profile in the FDTD solver, as there exists in the FDE solver : https://kb.lumerical.com/en/pic_passive_waveguides_exponential_index_profile_slab.html.
Does such an option exist in FDTD?
Thank you,
Colin


#2

Dear @colin.ducrotoy

Yes, you can simply copy-paste the objects from FDE into FDTD, and then use an index monitor to study the index profile of the objects. You can also add a port object, with similar geometry as FDE, to obtain identical results as you obtained for FDE simulations.

For your convenience I prepared similar geometry in FDTD (as exp-wg.lms in FDE):

exp-wg.fsp (358.3 KB)

Please let me know if you had further questions or any difficulties with FDTD simulations.

Thanks