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More services...Probing Effective Refractive Index in RF Module
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4 Replies
Last post: January 10, 2012 2:23pm UTC
November 22, 2010 8:42am UTC
Probing Effective Refractive Index in RF Module
Hi,
I've been working on calculating the effective refractive index of a photonic crystal based on a parametric sweep of a geometric parameter in COMSOL 4-->RF Module-->Mode Analysis. I have tried doing tutorials, asking professors at my university and e-mailing COMSOL support, yet I am still not able to probe the effective refractive index of the geometry as a function of my geometric parameter (layer thickness).
If anyone has any experience with probing variables in COMSOL, or who can help me conduct this sweep, it would be greatly appreciated.
To add an extra level of complexity, if anyone knows how to conduct a two parameter sweep, I would really appreciate this!
Thank you very much.
Kevin Shahbazi
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December 30, 2010 11:44pm UTC in response to Kevin Shahbazi
Re: Probing Effective Refractive Index in RF Module
Dear colleagues,
I have exactly the same problem. I am using Consol 4.0 with the RF module and I cannot get a list with my maximum neff values (I want to get the full, complex neff with the maximum real part for each mode found). I do a geometrical parameter sweep and get a lot of solutions with each a set of neff.
I can guess this is a problem which really many people have, doing work with comsol in optics particularly.
Best regards
Arian
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January 10, 2012 1:14pm UTC in response to Arian Kirsch
Re: Probing Effective Refractive Index in RF Module
Hi,
If you are using V4.2 then a global variable probe exists with a name neff (emw.neff). If you are using a previous version the you can use a probe variable with the expression j*lambda/emw.k0.
Does anyone now how to distinguish probes between different solutions?
Alx
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January 10, 2012 1:21pm UTC in response to Alexandros Kapsalis
Re: Probing Effective Refractive Index in RF Module
Hi
A probe generates a specific "Data Set - Probe Solution" there you see to which "Data Set - Solution" it points, slightly cumbersome I agree ;)
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Good luck
Ivar
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January 10, 2012 2:23pm UTC in response to Ivar Kjelberg
Re: Probing Effective Refractive Index in RF Module
Thanks for that,
Maybe I did not state my problem well. I have trouble getting the probe value of the effective index (neff) out of the same (probably) solution. For example I request more the one modes around an index value. The result of the probe always refers to the mode with the higher effective index.
Any ideas?
Thanks in advance
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