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PCF, PML

Posted 2012年11月18日 GMT-5 01:44 Version 4.2 5 Replies

Selim Habib
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Hi,

I am designing a PCF with hexagonal pattern having five air hole rings.
pitch = 1 um.
air filling fraction = 0.90
i have used circular PML to get the imaginary part of refractive index.
what should be thickness of PML ?
5 Replies Last Post 2013年2月15日 GMT-5 03:10
COMSOL Moderator

Hello Selim Habib

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Felipe Beltran-Mejia
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Posted: 1 decade ago 2013年2月4日 GMT-5 12:45
A good rule of thumb is to make the PML thickness equal to a few times the wavelength you are using.

cheers,
--
Felipe
A good rule of thumb is to make the PML thickness equal to a few times the wavelength you are using. cheers, -- Felipe
Sergei Yushanov Certified Consultant
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Posted: 1 decade ago 2013年2月4日 GMT-5 13:02
Actual thickness of PML domain is not important. Important is to place 4-5 elements through the thickness of PML domain. For better performance, used sweep mesh in 3D PML domain, or mapped mesh in 2D PML domain.

Regards,
Sergei
Actual thickness of PML domain is not important. Important is to place 4-5 elements through the thickness of PML domain. For better performance, used sweep mesh in 3D PML domain, or mapped mesh in 2D PML domain. Regards, Sergei
Felipe Beltran-Mejia
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Posted: 1 decade ago 2013年2月4日 GMT-5 13:29
Wow!

learning a new thing everyday, thanks!
--
Felipe
Wow! learning a new thing everyday, thanks! -- Felipe
Sergei Yushanov Certified Consultant
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Posted: 1 decade ago 2013年2月4日 GMT-5 13:35
Additional note regarding PML.

It is true, however, that boundary of PML domain should not be placed too close to the structure. Distance between structure and interior boundary of PML domain should be, at least, comparable to wavelength.

Regards,
Sergei
Additional note regarding PML. It is true, however, that boundary of PML domain should not be placed too close to the structure. Distance between structure and interior boundary of PML domain should be, at least, comparable to wavelength. Regards, Sergei
Md. Selim Habib
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Posted: 1 decade ago 2013年2月15日 GMT-5 03:10
Thanks every one.

Faced another problem. Now i am designing on hexagonal structure PCF of six air-hole rings and successfully
interface comsol 4.2 with matlab live link. The problem is that it takes a lots of time to simulate in Matlab when simulation is done in matlab.
Is there any procedure to reduce the time.



Thanks in advance.
Thanks every one. Faced another problem. Now i am designing on hexagonal structure PCF of six air-hole rings and successfully interface comsol 4.2 with matlab live link. The problem is that it takes a lots of time to simulate in Matlab when simulation is done in matlab. Is there any procedure to reduce the time. Thanks in advance.

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