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Equation of relative permitivitty as a function of refractive indices.

Posted Oct 3, 2020, 7:04 p.m. EDT 2 Replies

Israel Alves Oliveira
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Good night!

I would like to know why the equation is of relative permitivitty as a function of the refractive indices in the COMSOL differs from that of the literature.

epsilon_r: (n - k)² = (n² + k²) - 2ink - Comsol

epsilon_r: (n² - k²) + 2ink - Literature.

Thank you!

2 Replies Last Post Oct 3, 2020, 10:01 p.m. EDT
Robert Koslover Certified Consultant
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Posted: 4 years ago Oct 3, 2020, 9:31 p.m. EDT

Hmm.
See https://en.wikipedia.org/wiki/Refractive_index#Complex_refractive_index This may have to do with the choice of the sign in the exp(i omega t) term?

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Scientific Applications & Research Associates (SARA) Inc.
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Hmm. See https://en.wikipedia.org/wiki/Refractive_index#Complex_refractive_index This may have to do with the choice of the sign in the exp(i omega t) term?
Israel Alves Oliveira
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Posted: 4 years ago Oct 3, 2020, 10:01 p.m. EDT

It may be because of the harmonic response in metamaterials. I have to investigate further. Thank you!

It may be because of the harmonic response in metamaterials. I have to investigate further. Thank you!

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