[MPB-discuss] Group velocity of guided mode
I need to calculate the group velocity of the guided mode in 1-D line defect photonic crystal waveguide. When I extract the group velocities using grep I'm getting velocities for different k-points and different band gaps tevelocity:, 1, #(0.0 0.0 0.0), #(3.08591790567814e-8 -3.17361897850985e-10 0.0), #(-3.18411484190156e-8 8.71342196808855e-11 0.0), #(1.84721203025619e-8 8.50943462313198e-11 0.0), #(-1.74134645752838e-8 -8.68616295160761e-11 0.0), #(-3.7772400907894e-7 8.03424804528978e-11 0.0), #(-2.11572047798556e-7 -7.02123429895677e-11 0.0), #(-1.11656829528599e-5 3.29740544390964e-10 0.0), #(5.88498385990865e-5 2.54748780062977e-10 0.0) tevelocity:, 2, #(0.307842626631501 -1.05710206152388e-15 0.0), #(-0.306375565942897 4.39169137546245e-12 0.0), #(0.306191451559405 -5.2147365791715e-11 0.0), #(-0.302374230904649 5.21430531539878e-12 0.0), #(0.301861636273583 -7.89021001345105e-12 0.0), #(-0.295952089064426 -1.08606617225004e-10 0.0), #(0.2943892343767 -1.2497561620612e-11 0.0), #(-0.27378153579097 -2.61950834357133e-12 0.0), #(0.246972085727235 6.78484070946508e-12 0.0) tevelocity:, 3, #(0.307874225357897 2.98191519834776e-15 0.0), #(-0.30722391019847 8.68970169510119e-11 0.0), #(0.306812900930046 -1.84388853008345e-10 0.0), #(-0.305355084193399 -5.3571389939689e-12 0.0), #(0.304265426376774 4.91908787004334e-13 0.0), #(-0.301341960337996 -3.28548624382275e-11 0.0), #(0.298125554089018 -6.44688040255094e-12 0.0), #(-0.283177075609072 -4.84518748634126e-12 0.0), #(0.222551861651346 5.59117224725802e-12 0.0) tevelocity:, 4, #(0.307661346795037 -6.32456627857244e-15 0.0), #(-0.307443720320429 4.36350600459636e-12 0.0), #(0.306504436817747 -8.22640550826007e-11 0.0), #(-0.30575617804152 -3.29745306772771e-12 0.0), #(0.303752119135192 -3.29477877939267e-13 0.0), #(-0.302041943401158 -2.71566240944536e-11 0.0), #(0.296866132176718 -1.51944298931579e-12 0.0), #(-0.287532581139554 2.45493582564361e-12 0.0), #(0.177059998067604 1.43028979341483e-11 0.0) and so on How do I calculate the group velocity of the guided mode? ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] 1-D PhC
I want to create a line defect 1-D PhC waveguide. I want a single defect only in the centre. But whenever I run the code, I'm getting a defect in the centre of each block. And if I append the block of same size(0.3) of eps 4.41, I get a blank image. (define-param x-dim 1) (define-param y-dim 20) (define-param z-dim 4) (set! geometry-lattice (make lattice(size 1 1 no-size))) (set! default-material (make dielectric (epsilon 4.41))) (set! geometry(list(make block (material (make dielectric (epsilon 1))) (center 0 0 0) (size 0.3 1 infinity (set! geometry (append geometry (list (make block (material (make dielectric (epsilon 4.41))) (center 0 0 0) (size 0.1 1 infinity) (set! resolution 16) (set! k-points (list (vector3 0.5 0.5 0))) (set! num-bands 50) (run) Please help me with the necessary changes. ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] (no subject)
I want to create a line defect 1-D PhC waveguide. Below is my ctl file and the image of epsilon file. I have a default material of 4.41 dielecric constant and i have inserted blocks of air. To temove a single block, I have inserted a block of dielectric in the centre of slightly less radius. I want a single block of dielectric only in the centre which is of same radius as all other blocks. But whenever the run the code, I'm getting a dielectric in the centre of each block. Please help me find where am I going wrong? (define-param x-dim 1) (define-param y-dim 20) (define-param z-dim 4) (set! geometry-lattice (make lattice(size 1 1 no-size))) (set! default-material (make dielectric (epsilon 4.41))) (set! geometry(list(make block (material (make dielectric (epsilon 1))) (center 0 0 0) (size 0.3 1 infinity (set! geometry (append geometry (list (make block (material (make dielectric (epsilon 4.41))) (center 0 0 0) (size 0.1 1 infinity) (set! resolution 16) (set! k-points (list (vector3 0.5 0.5 0))) (set! num-bands 50) (run) Please help ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] Problem in 1-D waveguide
I want to create a line defect 1-D PhC waveguide. Below is my ctl file and the image of epsilon file. I have a default material of 4.41 dielecric constant and i have inserted blocks of air. To temove a single block, I have inserted a block of dielectric in the centre of slightly less radius. I want a single block of dielectric only in the centre which is of same radius as all other blocks. But whenever the run the code, I'm getting a dielectric in the centre of each block. Please help me find where am I going wrong? (define-param x-dim 1) (define-param y-dim 20) (define-param z-dim 4) (set! geometry-lattice (make lattice(size 1 1 no-size))) (set! default-material (make dielectric (epsilon 4.41))) (set! geometry(list(make block (material (make dielectric (epsilon 1))) (center 0 0 0) (size 0.3 1 infinity (set! geometry (append geometry (list (make block (material (make dielectric (epsilon 4.41))) (center 0 0 0) (size 0.1 1 infinity) (set! resolution 16) (set! k-points (list (vector3 0.5 0.5 0))) (set! num-bands 50) (run) ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] 1-D PhC
Hi. I want to create a 1-D Photonic crystal structure with blocks which is symmetric in only one direction. Where can I file the ctl file for 1-D PhC as I cannot see it anywhere in the manual http://ab-initio.mit.edu/wiki/index.php/The_MPB_Manual Please help. Thanks. ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] (no subject)
Hi. I want to create a 1-D Photonic crystal structure with blocks which is symmetric in only one direction. Where can I file the ctl file for 1-D PhC as I cannot see it anywhere in the manual http://ab-initio.mit.edu/wiki/index.php/The_MPB_Manual Please help. Thanks. ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
Re: [MPB-discuss] (no subject)
Thanks but this problem is solved. On Fri, Oct 9, 2015 at 11:15 AM, Ashina Garg <ashinagar...@gmail.com> wrote: > When i run the following command to see the output of mpb-data: > unix% h5ls epsilon.h5 > I'm getting the following error: > No command 'h51s' found, did you mean: > Command 'h5ls' from package 'hdf5-tools' (universe) > h51s: command not found > > > What to do for this? > > ___ > 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
[MPB-discuss] (no subject)
When i run the following command to see the output of mpb-data: unix% h5ls epsilon.h5 I'm getting the following error: No command 'h51s' found, did you mean: Command 'h5ls' from package 'hdf5-tools' (universe) h51s: command not found What to do for this? ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] (no subject)
I ran the following command mpb MPB-official-tutorial.ctl >& MPB-official-tutorial.txt and got the MPB-official-tutorial.txt file successfully but the epsilon.h5 file is neither opening nor running for any of my ctl files. I am unable to examine it and even on running the following command: h5topng −S 3 epsilon.h5 to examine the epsilon.h5 file by converting it into a PNG image I am getting the following error: HDF5-DIAG: Error detected in HDF5 (1.8.11) thread 139643247507264: #000: ../../../src/H5F.c line 1586 in H5Fopen(): unable to open file major: File accessibilty minor: Unable to open file #001: ../../../src/H5F.c line 1275 in H5F_open(): unable to open file: time = Wed Oct 7 19:07:51 2015 , name = '−S', tent_flags = 0 major: File accessibilty minor: Unable to open file #002: ../../../src/H5FD.c line 987 in H5FD_open(): open failed major: Virtual File Layer minor: Unable to initialize object #003: ../../../src/H5FDsec2.c line 343 in H5FD_sec2_open(): unable to open file: name = '−S', errno = 2, error message = 'No such file or directory', flags = 0, o_flags = 0 major: File accessibilty minor: Unable to open file h5topng error: error opening HD5 file Why is the HD5 file not opening? ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] Problem in understanding the execution of codes
Hi I am facing trouble in using MPB. I am new with this software and I am unable to understand the ctl file and where to form it and how to run the code. I read the manual too. It describes the various examples but still nothing is clear about how to execute them. Please help me understand where to begin from. ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
[MPB-discuss] Problem in installation of MPB
Hey. I have downloaded Ubuntu which is required for mpb installation. But I am unable to understand the installation of mpb. Please help me install it from the beginning. ___ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
