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Ansys Learning Forum › Forums › Discuss Simulation › Photonics › How to change the size a Plane Wave Source › Reply To: How to change the size a Plane Wave Source

March 6, 2024 at 5:40 pm
Amrita Pati
Ansys Employee

Hi Chuan,

The "Bloch/periodic" type of plane wave is used to represent a pure plane wave, as a result the solver has been designed to extend it through the entire simulation span. 

If you want to use a plane-wave of finite-size, you can use the "Diffracting" Type plane wave. The diffracting type plane wave is equivalent to plane waves passing through a rectangular aperture with the same size as the source span. It can also be used with PML boundaries but it will diffract.

Regards,
Amrita