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PML Reflections of a 3D Gaussian Beam
Posted Mar 10, 2014, 1:08 p.m. EDT RF & Microwave Engineering Version 4.3 1 Reply
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Hello,
I'm trying to model a Gaussian beam of 845nm wavelength in a simple air domain with a spherical PML. However, before I continue with my model, the PML doesn't seem to be absorbing the beam properly and I'm seeing what appear to be reflections in the solved model. The relative electric field is not zero, despite there being nothing for the beam to interact with in the air domain, leading me to think that I'm not setting up the PML properly. I've tried adjusting the PML width, number of layers (I generally use about 5), and scaling factor but nothing has worked so far. Also, using a finer mesh for the PML swept mesh didn't have much of an effect either. Any suggestions would be greatly appreciated, I'm sure I'm missing something.
Thanks in advance,
Brendan
I'm trying to model a Gaussian beam of 845nm wavelength in a simple air domain with a spherical PML. However, before I continue with my model, the PML doesn't seem to be absorbing the beam properly and I'm seeing what appear to be reflections in the solved model. The relative electric field is not zero, despite there being nothing for the beam to interact with in the air domain, leading me to think that I'm not setting up the PML properly. I've tried adjusting the PML width, number of layers (I generally use about 5), and scaling factor but nothing has worked so far. Also, using a finer mesh for the PML swept mesh didn't have much of an effect either. Any suggestions would be greatly appreciated, I'm sure I'm missing something.
Thanks in advance,
Brendan
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1 Reply Last Post Mar 11, 2014, 3:30 p.m. EDT
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Posted:
1 decade ago
Are you sure what you saw is reflection rather than just numerical noise?
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Pu, ZHANG
DTU Fotonik
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Pu, ZHANG
DTU Fotonik