Re: How to distinguish between the guided mode and folded mode, in a big supercell?

Dear Onder

Thanks for your Reply.

I want to find modes shape in Coupled cavity waveguide (array of point 
defects), so I have to use big supercell!
I start with a line defect in triangular lattice of holes.
I already plot the modes, would you please check the attachment which is 
a plot of the modes of a line defect in triangular lattice of holes 
(simulated by MPB and normal resolution ).
when I change the size of supercell, I can see more modes in the Gap. 
(Fig. a to c)
If I perform simulation only for big supercell(3a*11a), How could I know 
which mode has been folded and which one is  main propagated mode?


Thanks
and Best Regards
YingJun YL


On 1/10/2013 8:30 PM, [email protected] wrote:
> Send mpb-discuss mailing list submissions to
> 	[email protected]
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
> or, via email, send a message with subject or body 'help' to
> 	[email protected]
>
> You can reach the person managing the list at
> 	[email protected]
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of mpb-discuss digest..."
>
>
> Today's Topics:
>
>     1. Re: mpb-discuss Digest, Vol 82, Issue 3 (?zg?r ?nder KARAKILIN?)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 10 Jan 2013 02:01:38 +0200
> From: ?zg?r ?nder KARAKILIN? <[email protected]>
> To: [email protected]
> Subject: Re: [MPB-discuss] mpb-discuss Digest, Vol 82, Issue 3
> Message-ID:
> 	<[email protected]>
> Content-Type: text/plain;charset=iso-8859-9
>
> Hi Yingjun
>
> you can see by visualizing the mode image
>
> Onder
>
>
>> Send mpb-discuss mailing list submissions to
>> 	[email protected]
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> 	http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
>> or, via email, send a message with subject or body 'help' to
>> 	[email protected]
>>
>> You can reach the person managing the list at
>> 	[email protected]
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of mpb-discuss digest..."
>>
>>
>> Today's Topics:
>>
>>     1. How to distinguish between the guided mode and folded mode,
>>        in a big supercell? (Yingjun YL)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 09 Jan 2013 15:14:56 +0330
>> From: Yingjun YL <[email protected]>
>> To: [email protected]
>> Subject: [MPB-discuss] How to distinguish between the guided mode and
>> 	folded mode, in a big supercell?
>> Message-ID: <[email protected]>
>> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
>>
>> Dear Prof. and MPB users
>>
>> For simulating coupled cavities in photonic crystal slab, I have to
>> choose a big supercell (e.g. 5a * 15a in x and y direction respectively).
>>
>> In order to assure the correctness of the ctl file and simulation, I
>> simulate a photonic crystal waveguide by removing a row of holes in
>> trangular lattice of holes in PC. When I use 1a*15a supercell, I can see
>> clearly the Band Gap and guided mode in the gap. But when I use the 5a *
>> 15a supercell, several modes folded in band gap.
>>
>> How can I recognize the guided mode?
>>
>> Seems, my question is a basic question in PBG and photonic crystal, but
>> if any of the respected MPB user can help, it will be highly appreciated.
>>
>> Thanks
>>
>> Yingjun YL
>>
>> -------------- next part --------------
>> An HTML attachment was scrubbed...
>> URL:
>> <http://ab-initio.mit.edu/pipermail/mpb-discuss/attachments/20130109/efeb7c53/attachment-0001.html>
>>
>> ------------------------------
>>
>> _______________________________________________
>> mpb-discuss mailing list
>> [email protected]
>> http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
>>
>> End of mpb-discuss Digest, Vol 82, Issue 3
>> ******************************************
>>
>
> Pamukkale ?niversitesi
> M?hendislik Fak?ltesi
> Elektrik-Elektronik M?h. B?l.
> K?n?kl?-Denizli
> Tel: 0258 2963213
>
>
>
>
> ------------------------------
>
> _______________________________________________
> mpb-discuss mailing list
> [email protected]
> http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
>
> End of mpb-discuss Digest, Vol 82, Issue 4
> ******************************************

_______________________________________________
mpb-discuss mailing list
[email protected]
http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss