Learning Forum

[mijanur]

Respected sir/Madam,

1. We want to make finger electrode for periodic polibg of Lithium niobate. 1.a) Which is the best module to design and simulation of such kind of electrodes? 1.b)  Can I apply any arbitrary wave form ,like squire or pulse shape from external file? 1.c)  Which kind of file it will support?

2. Suppose  if we want to make a intensity modulator (e,g, Mach-zehnder modulator), for that we design and simulate the directional coupler in 3D FDTD, but 1.a) how and where (which module) could we apply voltage through electrode ? And 2.b) Which is the module used for I-diagram ?

Regards

Mijan

 

[Guilin Sun]

Please note that CHARGE is used to simulate carriers in semiconductors, and metals and insulators are ideal. It is not used to design the electrode.

If you want to simulate the electrode in FDTD, you can quantify transmission and diffraction.

For your 2nd question, when voltage changes from electrode, it will affect the effective index of the semiconductor. therefore you will need first to do a CHARGE simulation. and then import the carrier density into FDTD. Eye diagram can be simulated by INTERCONNECT.

Thus you will need at least CHARGE, FDTD and INTERCONNECT, and perhaps MODE.

Please refer to this example https://optics.ansys.com/hc/en-us/articles/360042327854-PIN-Mach-Zehnder-modulator

You can also search other related examples online in ansys optics.