[MPB-discuss] line-defect waveguide
Sir, I have to design a structure with SOI as substrate and Si layer over it with air holes etched.my aim is to achieve slow light . I am having trouble understanding the output of the extension code .I tried running the code according to my ctl file please guide as I am getting confusing(-ve group index values) results. Also guide regarding how to make calculations at some specific wavelength .suppose I want to make calculations of group index,group velocity ,dispersion and all other parameters at wavelength of 1.55 µm how can I do it.if you have any code regarding line-defect for slow light please provide it to me. if you can respond to my mail I will be really grateful ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] line-defect waveguide
Sir, I have to design a structure with SOI as substrate and Si layer over it with air holes etched.my aim is to achieve slow light . I have used extension code available on net for Dispersion calculation. I am having trouble understanding the output of the extension code.I tried running the code with some changes according to my ctl file I am getting outputs attached in file named group index. please guide as I am getting confusing(-ve group index values) results.if u can provide an email address iwould like to mail my results and ctl file ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
Re: [MPB-discuss] line defect waveguide
Hi Anshika, Did you use the slow light extension code developed at the University of St Andrews? If yes then please email me at: ssch...@uottawa.ca. I am one of the authors of that code and will try my best to help you. Kind regards, Sebastian Schulz Dr Sebastian Schulz Postdoctoral Fellow CERC Quantum Nonlinear Optics Department of Physics University of Ottawa www.quantumphotonics.uottawa.ca Tel: 613-562-5800 (7139) On Dec 8, 2013, at 12:00, mpb-discuss-requ...@ab-initio.mit.edu wrote: Send mpb-discuss mailing list submissions to mpb-discuss@ab-initio.mit.edu 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 mpb-discuss-requ...@ab-initio.mit.edu You can reach the person managing the list at mpb-discuss-ow...@ab-initio.mit.edu When replying, please edit your Subject line so it is more specific than Re: Contents of mpb-discuss digest... Today's Topics: 1. line-defect waveguide (anshika) -- Message: 1 Date: Sun, 8 Dec 2013 11:08:08 + (UTC) From: anshika er.ankitasharma1...@gmail.com To: mpb-discuss@ab-initio.mit.edu Subject: [MPB-discuss] line-defect waveguide Message-ID: loom.20131208t120447-...@post.gmane.org Content-Type: text/plain; charset=us-ascii Sir, I have to design a structure with SOI as substrate and Si layer over it with air holes etched.my aim is to achieve slow light . I have used extension code available on net for Dispersion calculation. I am having trouble understanding the output of the extension code.I tried running the code with some changes according to my ctl file I am getting outputs attached in file named group index. please guide as I am getting confusing(-ve group index values) results.if u can provide an email address iwould like to mail my results and ctl file -- Subject: Digest Footer ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss -- End of mpb-discuss Digest, Vol 91, Issue 1 ** ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
Re: [MPB-discuss] Line-defect waveguide problem
Thanks very much for your reply! The structure that i want to bulid is ONLY one line-defect in the whole square lattice.Even if I set the supercell parameter to 10, this line-defect is still periodic.That means the line-defect isn't sole.Like that: What I need is: (Infinite ...) (Infinite ...) How to do it? Best regards. 2010/12/29 imanol andoni iandone...@gmail.com Dear friend, I think you have a mistake in the supercell-y parameter. Your supercell width is 3 so MPB ensures a Bloch periodicity using a supercell composed by only three holes in y direction. You should probably try with: (define-param supercell-y 10) I'm waiting for hear from you. 2010/12/27 mpb-discuss-requ...@ab-initio.mit.edu Send mpb-discuss mailing list submissions to mpb-discuss@ab-initio.mit.edu 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 mpb-discuss-requ...@ab-initio.mit.edu You can reach the person managing the list at mpb-discuss-ow...@ab-initio.mit.edu When replying, please edit your Subject line so it is more specific than Re: Contents of mpb-discuss digest... Today's Topics: 1. Line-defect waveguide problem (???) -- Message: 1 Date: Mon, 27 Dec 2010 20:50:38 +0800 From: ??? carrot8...@gmail.com Subject: [MPB-discuss] Line-defect waveguide problem To: mpb-discuss@ab-initio.mit.edu Message-ID: aanlkti=xztp2oera9zfip2uuahextx_fpxia4djx7...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 Dear Prof. Johnson and Meep users, Hi all! I am new learner of MPB software and poor in English.So please forgive me for bad expression. I am trying to to calculate the waveguide of the square lattice structure that a line defect of the air holes on the epsilon.I use the line-defect.ctl for reference. like below: (define-param supercell-y 3) ; the (odd) number of lateral supercell periods (set! geometry-lattice (make lattice (basis1 1 0) (basis2 0 1) (size 1 supercell-y no-size))) (define-param r 0.2) ; the rod radius in the bulk crystal (set! geometry (list (make cylinder (center 0 0 0) (radius r) (height infinity) (material (make dielectric (epsilon eps)) (set! geometry (append (geometric-objects-lattice-duplicates geometry) (list (make cylinder (center 0) (radius r) (height infinity) (material air) then I got a result like that o= holes x=defcet Here is the problem,the square lattice structure that I want to calculate is ONLY one line-defect in that.That means the line-defect shall not be periodic.Like below: Could someone tell me how to write the .ctl fle? Really appreciate for your great help! -- next part -- An HTML attachment was scrubbed... URL: http://ab-initio.mit.edu/pipermail/mpb-discuss/attachments/20101227/32467558/attachment-0001.htm -- ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss End of mpb-discuss Digest, Vol 58, Issue 14 *** ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
