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How to transform permittivity tensor to index tensor?

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Hii everyone,
Recently I am working on the RF mode analysis,I need to set a anisotropy material.However without the conductivity,I have to input the index tensor.So how can i get a index tensor tensor from a permittivity tensor,is there any matrix transfomation in comsol?


regards,
Zhenzhao G

1 Reply Last Post 08.11.2016, 07:41 GMT-5

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Posted: 8 years ago 08.11.2016, 07:41 GMT-5
Why not input permittivity tensor directly? Both index and permittivity are supported.

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Pu, ZHANG
DTU Fotonik
Why not input permittivity tensor directly? Both index and permittivity are supported. -- Pu, ZHANG DTU Fotonik

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