Introducing non-linearity in photonic crystal as defect

[Dr. Subhashish Tiwari]

Hello Sir ,

I want to make a waveguide structure using the photonic crystals to act as a switch. I want to know how can i introduce non-linearity in one or more of the photonic crystals which will act as a defect. Is there any option to set the equations of non-linearity in Optifdtd as shown in the paper attached. Also how can i view the input outputs characteristics including reflectance and transmittance graphs.

Thank you

Attachments:

1. Fast-response1.pdf

[Aurelien Duval]

Hi,

Try this file.

By default, the input field is 1000 V/m, you’ll see that the light propagates across the crystal almost unperturbed. Now if you change the input field to 1 V/m (switch off the pump), then the light is steered to the other output port.

This is the expected behavior, however, I suspect a sign problem with the nonlinearities somewhere as the behavior is the inverse from the the paper!
You can try and experiment with various coefficients values and power levels.

Best regards

Attachments:

1. Thz_fast_response.fdt

+1

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