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Posted:
1 decade ago
09.04.2012, 13:07 GMT-4
You might have problems that were discussed here: http://www.comsol.com/community/forums/general/thread/27390/
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Posted:
1 decade ago
10.04.2012, 07:14 GMT-4
Hi, Alexander,
Thanks for your answer!
I have changed the port to be the scattering boundary condition, then the results are almost in the whole range of the calculated wavelength.
However, based on your discussion with Justin, I would like to add PML+Scattering BC to explore the results. Unlucky, I really do not know how to deal with it.
In my opinion, the PML should be outside the scattering BC, the calculate region should be as follows:
Simulated structure---scattering BC------PML (from inside to outside)
However, when I add a PML layer, all the boundary inner can not be defined as Scattering BC. When I try to add the scattering BC to the boundary of PML, then the calculation will be stopped, gives me some problems.
Could you or any other friend do me a favor to give me some advices?
Million thanks!
Hi, Alexander,
Thanks for your answer!
I have changed the port to be the scattering boundary condition, then the results are almost in the whole range of the calculated wavelength.
However, based on your discussion with Justin, I would like to add PML+Scattering BC to explore the results. Unlucky, I really do not know how to deal with it.
In my opinion, the PML should be outside the scattering BC, the calculate region should be as follows:
Simulated structure---scattering BC------PML (from inside to outside)
However, when I add a PML layer, all the boundary inner can not be defined as Scattering BC. When I try to add the scattering BC to the boundary of PML, then the calculation will be stopped, gives me some problems.
Could you or any other friend do me a favor to give me some advices?
Million thanks!
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Posted:
1 decade ago
10.04.2012, 12:38 GMT-4
The correct setup is Top boundary with excitation (preferrably port), Structure, PML, Scattering. Last scattering layer is not really necessary but won't hurt. But in this setup you can't measure transmission directly as you would using Port on bottom.
The correct setup is Top boundary with excitation (preferrably port), Structure, PML, Scattering. Last scattering layer is not really necessary but won't hurt. But in this setup you can't measure transmission directly as you would using Port on bottom.
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Posted:
1 decade ago
10.04.2012, 17:52 GMT-4
Hi, Alexander,
Thanks for your answer!
Based on your reply, if I want to get the reflection and transmission, the simulation arrangement should be
Top boundary with port (light excitation and the reflection record S31), PML, structure, PML, bottom boundary with Port (the transmission record S21)
I am very very stuck that:
Does the top PML allow the incident wave and prevent the reflected wave to pass?
If does, is it the regulation in COMSOL?
Or we should make some special settings to realize it? How?
Similarly to the bottom boundary.
Thanks very much!
Hi, Alexander,
Thanks for your answer!
Based on your reply, if I want to get the reflection and transmission, the simulation arrangement should be
Top boundary with port (light excitation and the reflection record S31), PML, structure, PML, bottom boundary with Port (the transmission record S21)
I am very very stuck that:
Does the top PML allow the incident wave and prevent the reflected wave to pass?
If does, is it the regulation in COMSOL?
Or we should make some special settings to realize it? How?
Similarly to the bottom boundary.
Thanks very much!
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Posted:
1 decade ago
10.04.2012, 20:38 GMT-4
Based on your reply, if I want to get the reflection and transmission, the simulation arrangement should be
No. If you want both transmission and reflection, no PML layers at all (same as plasmonic grating example). If reflection is enough, then use PML on the bottom and port on the top.
[QUOTE]
Based on your reply, if I want to get the reflection and transmission, the simulation arrangement should be
[/QUOTE]
No. If you want both transmission and reflection, no PML layers at all (same as plasmonic grating example). If reflection is enough, then use PML on the bottom and port on the top.
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Posted:
1 decade ago
11.04.2012, 17:37 GMT-4
Hi, Alexander,
Thanks for your answer!
I will make the related modification, and expect to discuss with you later!
Regards!
Hi, Alexander,
Thanks for your answer!
I will make the related modification, and expect to discuss with you later!
Regards!
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Posted:
1 decade ago
12.04.2012, 07:11 GMT-4
[QUOTE]
You might have problems that were discussed here: http://www.comsol.com/community/forums/general/thread/27390/
[/QUOTE]
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Posted:
1 decade ago
12.04.2012, 15:30 GMT-4
Hi, Alexander,
I checked my code again and again, and the simulation results are still incorrect based on the literature.
Is it easy for you to leave your email to me? I will send you my code.
Or you can contact me by email: mayouqiao188@hotmail.com
Million thanks!
Hi, Alexander,
I checked my code again and again, and the simulation results are still incorrect based on the literature.
Is it easy for you to leave your email to me? I will send you my code.
Or you can contact me by email: mayouqiao188@hotmail.com
Million thanks!
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Posted:
1 decade ago
12.04.2012, 17:00 GMT-4
Hi,
Please post your model on the forum after clearing solutions and meshes.
Hi,
Please post your model on the forum after clearing solutions and meshes.
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Posted:
1 decade ago
12.04.2012, 18:12 GMT-4
Hi, firstly I would like to upload my code, however, i do not know how clean the solutions and meshes.
I will do a new code without any solutions again and upload it ASAP!
Regards!
Hi, firstly I would like to upload my code, however, i do not know how clean the solutions and meshes.
I will do a new code without any solutions again and upload it ASAP!
Regards!