Learning Forum

[Jordi Lopez Leyva]

I'm trying to simulate a 1D photonic crystal nanobeam of GaAs with pockels Chi2 effect. I'm doing so by implementing 2 dipole sources at the center. However, the movie shows no light is guided for high powers of the dipoles. For low dipole power I don't have this issue and light is perfectly guided.

I'm using 2 electric dipole source in FDTD, with total amplitude ~ 2e-24 and power ~2mW. I obtain power via dipolepower command. My material is GaAs nanobeam with Chi2, with air holes, and surrounded by SiO2 and a polymer of n = 1.6. I'm using standard PML boundaries and high mesh density.

Questions I have

1. Am I calculating the power correctly?
2. Do I need to change boundary conditions?
3. How can I fix the simulation instability?

For reference, here's a snapshot of the movie:

[Dev]

Hello,

Please try not to post duplicated post in another Forum.

You can refer the optical forum post response: 3D FDTD simulation with 1mW dipole and nonlinear chi2 material not stable (ansys.com)

Thanks and regards

Devika