Ansys Learning Forum Forums Discuss Simulation Photonics DGTD band structure calculation Reply To: DGTD band structure calculation

Guilin Sun
Ansys Employee

Unfortunately band structure simulation requires to use Bloch boundary conditions, and DGTD has not implemented yet:

https://optics.ansys.com/hc/en-us/articles/360034918593-Boundary-conditions-in-DGTD-Simulation-Object

https://optics.ansys.com/hc/en-us/articles/360034382714-Bloch-boundary-conditions-in-FDTD-and-MODE

https://optics.ansys.com/hc/en-us/articles/360034382734-Periodic-boundary-conditions-in-FDTD-and-MODE

So even though you set angles it will be like normal incidence.

Please file a feature request for this: 

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