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Gain Medium with Circularly polarized light in COMSOL
Posted 31.01.2013, 12:19 GMT-5 2 Replies
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Dear All
COMSOL follows exp(-iwt) modeling in the and hence the absorption of the material is given by imag(permittivity) >0.
If I want to simulate a gain medium, is it trivial to replace the imag(permittivity) < 0 ? or am I missing something.
The other question is regarding : how to set the circularly polarized light
Assume wave propagates in +x direction
E =(0 0 1) implies linear polarization
if I set E = ( 0 i 1) does this mean its a circularly polarized light since there is phase difference between Ex and Ey?
Any help will be appreciated.
Thank you.
COMSOL follows exp(-iwt) modeling in the and hence the absorption of the material is given by imag(permittivity) >0.
If I want to simulate a gain medium, is it trivial to replace the imag(permittivity) < 0 ? or am I missing something.
The other question is regarding : how to set the circularly polarized light
Assume wave propagates in +x direction
E =(0 0 1) implies linear polarization
if I set E = ( 0 i 1) does this mean its a circularly polarized light since there is phase difference between Ex and Ey?
Any help will be appreciated.
Thank you.
2 Replies Last Post 04.02.2013, 12:44 GMT-5
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Posted:
1 decade ago
I think COMSOL uses exp(iwt) for the time part.
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Posted:
1 decade ago
Hi Pu
You are right. It is exp(iwt) hence imag(permittivity) <0 implies absorption and imag(permittivity) >0 implies gain.
You are right. It is exp(iwt) hence imag(permittivity) <0 implies absorption and imag(permittivity) >0 implies gain.