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Help with generating emissivity plots for thin metal foils under the infrared spectrum

Posted Apr 7, 2022, 1:49 p.m. EDT RF & Microwave Engineering, Wave Optics Version 5.6 1 Reply

Harshil Pisavadia
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When trying to generate emissivity plots of thin metal films (e.g., silver), I get oscillations with peaks below 0 emissivity (as shown in the attached image). From what I have seen in the literature, there should not be any oscillations and instead have an almost linear curve at around 0.004 emissivity.

I am using the RF module (Electromagnetic waves, frequency domain (emw)), floquet boundary conditions, and a scattering boundary condition at the top of a PML layer of air. I have also attached the COMSOL file.

Any advice/comments to why these oscillations are occuring would be greatly appreciated! Thanks in advance.

1 Reply Last Post Apr 20, 2022, 7:55 a.m. EDT
Robert Fennis
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Posted: 3 years ago Apr 20, 2022, 7:55 a.m. EDT

Are you perhaps plotting the real part of something instaed of its magnitude?

Are you perhaps plotting the real part of something instaed of its magnitude?

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