[Meep-discuss] Meep installation notes for macOS Sierra, July 2017

[On behalf of John Weiner, I forward his experience with installation of MEEP on Mac OS. John's kind contribution follows. -- Filip] Dear Meep Users and Developers, I have been able to install meep-1.3 on two different iMacs (one in Washington DC( Sierra 10.12.5) and the other in Paris (Sierra

Re: [Meep-discuss] Compiling Meep 1.3 on Debian 8.5 (uniprocessor, not MPI); First three tutorials

the interactive > commands at the start of the tutorial: > > http://ab-initio.mit.edu/wiki/index.php/Meep_Tutorial > > - - - - > > (set! geometry-lattice (make lattice (size 16 8 no-size))) > > (set! geometry (list > (make block (center 0 0) (size i

Re: [Meep-discuss] trying to find charge density of metamaterials

Hi, assuming you are able to compute a time-domain simulation of the metamaterial unit cell, there should be no big problem to 1) resolve the resonance frequencies of each mode, then to 2) switch to a narrow-band source with the actual frequency of the mode you are interested in, 3) record the

Re: [Meep-discuss] meep-discuss Digest, Vol 127, Issue 1

Excuse my little advertisement, but here I have written script that compiles the freshest version of MEEP on your Ubuntu system: https://github.com/FilipDominec/python-meep-install/blob/master/python-meep-install.sh It was tested on many systems and it should work out-of-the-box also on your

Re: [Meep-discuss] MEEP slow after Ubuntu 16.04 upgrade

mally without taking too much time. > Other computational tools are running normally, for example matlab, I have > not seen any performance drop after the Ubuntu upgrade. > Best regards, > Jisha > > > On Thu, Sep 1, 2016 at 2:13 PM, Filip Dominec <filip.domi...@gmail.com> > wrote

Re: [Meep-discuss] MEEP slow after Ubuntu 16.04 upgrade

Hi, 1) Do you use multiprocessing? If so, which implementation, MPICH or OpenMPI? 2) Do you use HDF5 export? If so, which kind of HDF libraries, MPI-enabled or "serial"? The latter is known to be very slow when used in multiprocessing setup, though they should not alter subpixel averaging. 3) Did

Re: [Meep-discuss] LDOS calculation in Python-Meep

am I doing something wrong?. Is there > any workaround to get the values of the ldos calculation in Python-Meep or > Scheme or C++ interface for MEEP are needed to get them?. Anyone tried this > before?. > > > Thank you in advanced for any help! > > Eduardo > &g

Re: [Meep-discuss] Plane Wave Source

Dear Craig, if I do not miss something, you may easily define a (perpendicular or even oblique) plane wave source as shown in https://www.mail-archive.com/meep-discuss@ab-initio.mit.edu/msg03088.html F. 2016-08-26 7:51 GMT+02:00, Craig Milde : > Hi meep discussion list,

Re: [Meep-discuss] MEEP output interpretation

Dear Craig, from your e-mail it is not clear what steps you actually tried to extract the field data from the HDF file. Can you run, e.g., this? h5tovtk input.h5 -o output.vtk paraview output.vtk You should be able to add some monitor plane in paraview and browse the field records as you wish.

Re: [Meep-discuss] 3D Plane Wave source

Dear Saket, just define the source amplitude as a harmonic function, with the periodicity corresponding by the desired transverse component of the wave vector. Filip 2016-07-27 21:03 GMT+02:00, saket wankhade : > Dear meep users, > I need a tilted

Re: [Meep-discuss] Compuation of electric field

Hi, I would rather guess the images Saket gets are really full black, which would mean that there are "NaN" values in the output of the computation. This may result from some numerical instability. I suggest to try first to halve the simulation time until the field gets finite. Then one can

Re: [Meep-discuss] numerical instability in vacuum - no materials, no pml

Hi, whenever you set the phase in either the Y- or Z- symmetry to -1, the simulation eventually becomes unstable. I have tested out all four combinations for you, and I can tell that only (set! symmetries (list (make mirror-sym (direction Y) (phase 1)) (make mirror-sym (direction Z) (phase

Re: [Meep-discuss] doubt regarding subpixel averaging behaviour

h 7 or less processors it works and for 8 processors it > doesn't appear, so I'm guessing it is not working. I couldn't check if > it's affecting my results yet. > > Pablo. > > El 21/09/15 a las 19:36, Filip Dominec escribió: >> Dear Pablo, how exactly does the bug manifest?

Re: [Meep-discuss] diffraction limit

Dear Amin, I am afraid your question should be better searched/posed e.g. in http://physics.stackexchange.com/ rather than to the MEEP community. Your question has multiple answers depending on the point of view. 1) The most straightforward is that Maxwell equations have some solutions and

Re: [Meep-discuss] Source code: Nonlinear polarization

Dear Vladimir, search for the variable 'chi2' in the code, it is used in multiple files. The actual computation of its physical effect should be in step_generic.cpp Filip 2015-07-22 23:05 GMT+02:00, Владимир Борисович Новиков vb.novi...@physics.msu.ru: Dear all, Please show code place in

Re: [Meep-discuss] Reconfigurable medium meep computation

Dear Nicolas, I guess the optical and mechanical processes happen at completely different time scales (picoseconds to microseconds at least). Perhaps the simplest way is to re-iterate multiple separate simulations, with each simulation's structure being defined by the result of the previous

Re: [Meep-discuss] bragg structure with kerr effect ....

Hi, Alshikh, from what I understand, you shall introduce another callback function like your eps_bragg(const vec pt), which will return the value of the Kerr coefficient. It should be called in a similar manner as e.g. the susceptibilities are. I always found it useful to test out the Kerr

Re: [Meep-discuss] Compiling Meep 1.3 on Debian 8 (testing) - HDF5 library troubles

Dear all, in 2015, there have been numerous reports of MEEP not compiling with HDF5 on Debian Jessie and newer versions of Ubuntu [1,2]. This happened due to a known change in the system [3]. After a longer trial-and-error, I found the required change in the LDFLAGS variable so that I can compile

Re: [Meep-discuss] missing _H5P_CLS_DATASET_CREATE_g

Dear all, I am, too experimenting with this issue at the moment. You can clone my repository with the installation scripts for the latest python-meep from: https://github.com/FilipDominec/python-meep-install. The advantage of using git is in clarity: Every modification of the installation

Re: [Meep-discuss] Precompiled package for meep 1.3

Dear Vladimir and all interested, to my knowledge there is no precompiled MEEP of the version 1.3 for Debian-based systems. Version 1.2.1 has been readily available for over a year thanks to Thorsten Alteholz. I prepared a compilation script, and planned to package the very latest MEEP and

Re: [Meep-discuss] FW: Si material parameters for MEEP C++

Dear Shin-Woong, I did not compile your code, but I have few thoughts: 1) First, the material should be tested on a half-space, not a slab. The latter combines too much physics, i.e. the Lorentz-Drude model with a pronounced Fabry-Pérot interference (which is moreover modulated by the dispersion

Re: [Meep-discuss] flux spectrum of continuous source

/eoinmurray/meep-test.git https://github.com/eoinmurray/meep-test.git Thanks again for the help. Eoin Begin forwarded message: Date: 1 May 2015 20:59:41 BST Subject: Re: [Meep-discuss] flux spectrum of continuous source From: Filip Dominec filip.domi...@gmail.com mailto:filip.domi

Re: [Meep-discuss] Plane wave in meep (C++)

Dear Amrit, I deduce you are interested in _oblique_ incidence of the plane wave. Perhaps the optimum solution would be to freely rotate the source object in space; however to my knowledge this is not possible. It is however relatively easy to make a source emit with a transverse component of the

Re: [Meep-discuss] CAD tool for Meep

From my personal point of view, MEEP is mostly used for scientific research rather than engineering. Most simulations therefore deal with complicated physical interpretation of rather simple structures. The highlights of MEEP are the possibility to defive various physical phenomena and its

Re: [Meep-discuss] Python-Meep Investigation

/FilipDominec/python-meep-install Filip 2015-03-25 4:05 GMT-04:00, Filip Dominec filip.domi...@gmail.com: Hi, it is as you write, and therefore I would like to make the blue-boxed installation failsafe on as many systems as possible. Currently it is known to work on Ubuntu, but yesterday I finally

Re: [Meep-discuss] Low frequency modulation

Hi, Gib, it appears there are two resonant modes relatively close in frequency (separated by 1/4 of their center frequency, as you wrote). You may wish to set the 'width' to some reasonable value so that the spectrum of the source is narrower.

Re: [Meep-discuss] Low frequency modulation

.I am about to test that. I did try to use the frequency domain solver, but it ran for hours and failed to converge. I don't know what that signifies. Cheers Gib From: Filip Dominec [filip.domi...@gmail.com] Sent: Tuesday, 31 March 2015 8:54 p.m

Re: [Meep-discuss] Numerical dispersion?

Hi, Glenn, in my experience, the speed of light and generally the results in MEEP are quite accurate (compared to theory, other methods or experiment) until the wavelength becomes comparable to several voxels - in which case however also the structure ceases to be described correctly. Thus I

Re: [Meep-discuss] What is strides in Meep sources?

As far as I understood the source, the 'stride' represents how much bytes in the computer memory shall be skipped to get to the voxel in the neighboring row. More readable, but perhaps less efficient, implementation would be to address the voxels as a 2-D or 3-D array. Is this correct? Filip

Re: [Meep-discuss] What is strides in Meep sources?

; case R: the_stride[d] = nz()+1; break; case X: the_stride[d] = (nz()+1)*(ny() + 1); break; case Y: the_stride[d] = nz() + 1; break; case P: break; // There is no phi stride... case NO_DIRECTION: break; // no stride here, either } } 2015-03-26 20:07 GMT+03:00 Filip Dominec

Re: [Meep-discuss] Calculation of response time of a device in meep

Hi, Nimala, perhaps it is possible. Could you specify your task in more specific words, please? The custom source can be easily found on the net, e.g. http://comments.gmane.org/gmane.comp.science.electromagnetism.meep.general/3936 Filip 2015-03-26 3:57 GMT+01:00, nirmala dsouza

Re: [Meep-discuss] Calculation of response time of a device in meep

. It is like a Y shaped PC waveguide. Now I want to calculate , how much time the device will take responds to the input signals ? Nirmala On Thu, Mar 26, 2015 at 12:35 PM, Filip Dominec filip.domi...@gmail.com wrote: Hi, Nimala, perhaps it is possible. Could you specify your task in more

Re: [Meep-discuss] Meep can't find HDF5 libraries during ./configure

/libhdf5_openmpihl_fortran.so.8 /usr/lib/x86_64-linux-gnu/libhdf5_serial_fortran.a /usr/lib/jni/libjhdf5.so I also tried to add the libraries separately with: export LD_RUN_PATH=/usr/local/lib/:/usr/lib/x86_64-linux-gnu/hdf5/openmpi/ but no luck. On Mon, 2015-03-23 at 09:10 +0100, Filip Dominec wrote: Hi, from

Re: [Meep-discuss] Frequency-domain solver

. It would be great if you could point me to an example .ctl file that executes multiple simulations, creating file names appropriately. Thanks Gib From: Filip Dominec [filip.domi...@gmail.com] Sent: Thursday, 19 March 2015 12:16 p.m. To: Gib Bogle Cc

Re: [Meep-discuss] Frequency-domain solver

Hi, Gib, it looks exactly like the bug that has been resolved in git commit https://github.com/stevengj/meep/commit/0640e9f6a2ccfa2a40375a89b5692ebb1fb87efb Could you check a recent version of MEEP either compiling it from source (blue box in http://f.dominec.eu/meep/index.html#install), or

Re: [Meep-discuss] Frequency-domain solver

meep-1.2.1.tar.gz from http://ab-initio.mit.edu/wiki/index.php/Meep_download in January this year. This claims to be the latest release - is this not the case? Cheers Gib From: Filip Dominec [filip.domi...@gmail.com] Sent: Thursday, 19 March 2015 11

Re: [Meep-discuss] h5ls: unable to open file. python -meep

Hi, Julián, your script works for me. I get the same result from 1- and 2-process simulation. I have h5utils in version 1.12.1, and freshly-compiled meep 1.2.1 python-meep according to the blue box at http://f.dominec.eu/meep/index.html#install Could you somehow examine the sample.h5 file? Its

Re: [Meep-discuss] Seeking advice for measuring transmission spectra

Dear John, I can not confirm not deny your approach is correct. I use another way to get the incident/transmitted/reflected fields from a structure in free space. Most importantly, it provides also the phase information, and also allows to get all the reflection and transmission coefficients in

Re: [Meep-discuss] help for calculation of transmission and reflection of photnic crystals slabs

Hi, Saeid, your task has been perhaps done by somebody else, please take a look at https://timsaucer.wordpress.com/2013/04/30/building-l3-photonic-crystal-cavity-in-meep-1-finding-mode/, http://comments.gmane.org/gmane.comp.science.electromagnetism.meep.general/10,

Re: [Meep-discuss] Error while using perfect-metal

Dear Jim, this seems to be a result of instability, resulting in saturated (i.e. infinite or NaN) values as you suggest. To verify this, you may shorten the simulation until you get some image that is not plain black. As a matter of fact, the instability does not occur instantly, but it takes it

Re: [Meep-discuss] Puzzling results for reflection spectrum

Hi, if you properly divide the reflected amplitude by the incident amplitude, the reflection of a linear system should indeed be the same, independent of the source duration and spectrum. If it is not, one possible cause may be that you clip the time record while the source was still running, or

Re: [Meep-discuss] Gaissian Distribution of Phase

Hi, currently I do not have the example you mention, but surely you can make a focused beam from an oblique beam, by introducing a *quadratic* term into the imaginary part of the exponential that defines the source amplitude. If you wish to build a focused *gaussian* beam, you will also wish to

Re: [Meep-discuss] meep and python-meep on OS-X

Thank you, Glenn, great job. I will be happy to add a link to your post! Filip ___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss

Re: [Meep-discuss] how to define a invariable complex refractive index?

Dear Liu, from the principle of FDTD computation, there is no other way how to define complex refractive index than to include dispersion. Either you may introduce a Drude term (conductivity), or some high-frequency Lorentzian. More details are here:

Re: [Meep-discuss] Slow calculation with meep parallelisation

tried multiprocessing on single node too. And the problem persists. Is it a common problem with meep multiprocessing? Thanks and Regards, Ratnesh -Original Message- From: Filip Dominec [mailto:filip.domi...@gmail.com] Sent: Tuesday, December 02, 2014 3:41 PM To: Gupta, Ratnesh (GE

Re: [Meep-discuss] Scaling - dielectric-epsilon, metal-copper, lattice/resolution and Symmetry

continued support. Steve On Mon, 2014-11-24 at 13:53 +0100, Filip Dominec wrote: Dear Steve, 1) Use the value of 2.3. The static permittivity is invariant to scaling. 2) If you wanted to model realistic copper, with scaling of 1:1e6, you would have to feed MEEP with values normalized

Re: [Meep-discuss] Scaling - dielectric-epsilon, metal-copper, lattice/resolution and Symmetry

Dear Steve, 1) Use the value of 2.3. The static permittivity is invariant to scaling. 2) If you wanted to model realistic copper, with scaling of 1:1e6, you would have to feed MEEP with values normalized to the scaling (1e6) and also by the speed of light (2.998e8). For instance, the physical

Re: [Meep-discuss] Dispersive anisotropic media

at 9:04 PM, Filip Dominec filip.domi...@gmail.com wrote: Dear Rajath, it pretty much looks like missing- or incompatible version of libhdf. Have you tried the compilation procedure from this site? http://fzu.cz/~dominecf/meep/index.html#install I tested it on several different systems to work

Re: [Meep-discuss] Units in Meep

I am convinced that it would be more convenient if MEEP allowed one to use the true SI units. (Thanks to the terahertz time-domain spectroscopy, I can directly compare data from simulation and from our laboratory.) The current approach of normalized units is however just a formal complication and

Re: [Meep-discuss] monochromatic source

Hi, Farhad, generally both the continuous and the narrow-band-gaussian sources are good choices. Note however that for mathematical reasons a source short in time will always have a broad spectrum. Spectral selectivity has to be paid with computation time. Fortunately, the Fourier transform of a

Re: [Meep-discuss] Part of PML

Hi, Sophia, as far as I know, it is possible to overlap any material with PML. The PML condition however applies for the whole boundary, so it can not be defined in its part only. Note I had some numerical stability issues when the PML was defined on one axis only while the other boundaries were

Re: [Meep-discuss] Complex transmission and reflection coefficients

Hi, Joshua, I am not sure if it will be helpful to you, but two years ago I wrote a similar simulation of complex scattering coefficients (reflection+transmission) from a SRR or any other metamaterial unit cell. The codes are in python-meep and are publicly available at

Re: [Meep-discuss] real metal material

conductor with tiny resistivity, again -- PEC. Complex infinity has no sign. Hope this helps, Filip Dominec IOP ASCR, Prague 2014-06-19 14:07 GMT+02:00, Weiner John johwei...@gmail.com: Dear meep users and experts: I am really stuck, and I need your help. I am trying to implement a real metal

Re: [Meep-discuss] Multiple wavelengths and light direction

Hi, 1) spectrum: although the gaussian source with frequency around (1/1.55) would give an approximate result, you probably want to use the band_src_time which is described here: http://fzu.cz/~dominecf/misc/meep/index.html#bandsource I am going to contribute the code to github today. 2) If you

Re: [Meep-discuss] (no subject)

shouting, and the hashmarks look like something as banging your fist on the table before and after saying it... Regards, Filip Dominec 2014-06-12 18:01 GMT+02:00, #SHAMPY MANSHA# shampy...@e.ntu.edu.sg: Dear Steven and other Meep users, I am doing a simulation in which I require to use a complex

Re: [Meep-discuss] Beam splitters in meep?

Hi, as a simplest approach, I would suggest to reduce the 'sigma' parameter of the metal, first. It should allow the transmission to be adjusted even in the case of a low resolution. Filip 2014-05-26 7:06 GMT+02:00, jayv war...@gmail.com: I need some beam splitters with varying T/R ratios, and

Re: [Meep-discuss] Permittivity of Silicon

Dear Thomas and all, I wrote most of my thoughts on the referred page; while sometimes the discrete Lorentzian oscillators suffice to precisely describe the dielectric function in the frequency range of interest, the optical spectra of semiconductors are usually of the harder cases. You can

Re: [Meep-discuss] Read refractive index data from file

If I correctly understand your question, you wish to define material properties as an arbitrary function of frequency. This is generally not possible in FDTD, see e.g. http://ab-initio.mit.edu/wiki/index.php/Dielectric_materials_in_Meep Filip 2014-05-13 19:07 GMT+02:00, Charalampos Mavidis

Re: [Meep-discuss] PML overlapping dispersive material

Hi, Sophia, from my personal experience, the dispersive material can overlap with PML in the simulations. The question of stability under such conditions may be quite hard, though. You probably have to find out by trying which parameters are stable - and which not. Regards, Filip 2014-05-07 12:07

Re: [Meep-discuss] Drude material in MEEP

Dear Allen, surely the best guide for defining the Lorentzian model for materials in MEEP is http://ab-initio.mit.edu/wiki/index.php/Meep_Tutorial/Material_dispersion where also a working example is presented. I must apologize for the statement that you have to use a low-frequency Lorentzian

Re: [Meep-discuss] Meaning of Complex fields in hd5 files

Hi, jayv, the real and imaginary fields should be the same except for that the imaginary part if shifted by 1/4 of its period. Thus computing the modulus of the complex fields you get a smooth, non-oscillating function, describing the magnitude of the field amplitude. I think you can disregard

Re: [Meep-discuss] Drude material in MEEP

Dear Allen, If I correctly understand your question, the Drude model can be approximated by the polarisation coming from a Lorentz oscillator with as extremely low resonance frequency. General approach is to select a realistic plasma frequency (for instance, omega_p := 2*pi*3.64e15 rad/s for

Re: [Meep-discuss] Zero Amplitude source

Hi, you can probably set the source cutoff to 0 (http://ab-initio.mit.edu/wiki/index.php/Meep_Reference#source). (But I must admit that I do not understand the purpose to do this.) F. 2014-04-23 22:13 GMT+02:00, James Green mr.james.gree...@gmail.com: Dear MEEP users, Does anyone have any

Re: [Meep-discuss] why the energy spectrum radiated by a point source doesn't match with the spectrum of source itself?

May it be attributed to that the radiated field is a derivative of the current, so that high-frequency components are enhanced compared to the lower frequency ones? Or is it a more complicated deviation? Regards, Filip 2014-04-22 16:01 GMT+02:00, Ehsan Saei e.s...@hotmail.com: Dear Steven and

Re: [Meep-discuss] why the energy spectrum radiated by a point source doesn't match with the spectrum of source itself?

This appears exactly as the result of the said effect. The good point is that the gaussian source shape is reasonably preserved upon differentiation, so you may pre-compensate it by fcen=0.40. Or, if you have tighter requirements on the source, you may use the newly implemented feature of

Re: [Meep-discuss] Doubt about concept of flux spectrum in MEEP

with the Fourier-transformed fields in the same cross-section. This is certainly do-able to implement (at least for dispersionless materials). On Apr 14, 2014, at 5:21 PM, Filip Dominec wrote: This is true - I mostly simulate the behaviour of an infinite periodic array of scatterers, so I am

Re: [Meep-discuss] Doubt about concept of flux spectrum in MEEP

Another option would be to define an amplitude-recording-plane: for instance, knowing the Ex-field and Hy-field, one can easily separate the amplitudes of both forward- and backward-propagating waves along the z-axis. The usual scattering problems with properly absorbing boundaries then require

Re: [Meep-discuss] meep-mpi doesn't print anything in terminal

Dear Ehsan, on Linux, you can use the 'tee' command: mpirun -np 8 meep-mpi test.ctl| tee test.out Did it help? Filip 2014-04-10 8:39 GMT+02:00, Ehsan Saei e.s...@hotmail.com: Dear all, I try to run a ctl file using meep-mpi on a ubuntu machine with the following command line:

Re: [Meep-discuss] Meep frequency snapshots and near to far field transform

Dear Arthur, thank you for sharing your code! I cloned your source, downloaded the meep 1.2.1 sources and copied your files over the original directory. Then I used my old compilation procedure on Ubuntu [1] to compile meep and rebuilt the python-meep interface. The new functions of snapshot()

Re: [Meep-discuss] silica dispersion model

Dear Pablo, I plot the Lorentz model for silica at http://fzu.cz/~dominecf/misc/eps/#SiO2 The page also contains the numerical data for the Lorentzian oscillators, along with additional information about the sources and application of the data. Hope this helps, Fillip 2014-02-26 13:14 GMT+01:00,

Re: [Meep-discuss] wave guide coupling

simple task. If there is coupling of freely propagating wave to any waveguide, the task becomes a bit more complicated and a sketch of your geometry would be needed. Best regards, Filip Dominec 2014-02-13 16:44 GMT+01:00, ISAAC MATERE matere.is...@yahoo.com: Hi meep users am trying to come up

Re: [Meep-discuss] (no subject)

implemented in MEEP successfully so even this can be done. The article touches a quite interesting topic, by the way. Best wishes, Filip Dominec 2014/1/6, FARHAD KAZEMI farhad...@yahoo.com: Dear all, I would like to model the radiation transfer between two plates separated by nano-gap in which we

Re: [Meep-discuss] (no subject)

a surface with a finite temperature? Thank you again. sorry if my message is long. Farhad On Monday, January 6, 2014 5:50 PM, Filip Dominec filip.domi...@gmail.com wrote: Dear Farhad, I am not an expert nor I have thoroughly read the referred article, but I believe the non-radiative

Re: [Meep-discuss] Designing inclined geometry

Dear Prem, as far as I know, this task would require either 1) to build the desired structure by overlapping a big (potentially infinite) number of overlapping blocks, or 2) load the structure pixel-by-pixel either from a data file, or from a mathematical expression. I spent several days

Re: [Meep-discuss] refractive index of silicon

consumes CPU time! Some remarks on the materials in MEEP and FDTD stability is also here: http://fzu.cz/~dominecf/misc/meep/#mat_mod Regards, Filip Dominec On Fri, 20 Sep 2013 15:55:50 -0700 Rui La larui...@gmail.com wrote: Dear meep users, I want to study the short wavelength light(300

Re: [Meep-discuss] Fw: question about meep

Dear Lin, for better illustration of what actually happens, could you generate the images again with the source shifted downwards, e. g. to 1/4 of the picture height? Thanks, Filip 2013/7/9, nw...@mail.sim.ac.cn nw...@mail.sim.ac.cn: Dear meep users I'm a student of CAS(Chinese

Re: [Meep-discuss] add-field, save-field, load-field, etc.

Hi, John, other people have asked a similar question and I am afraid it is not implemented yet. It is one of the features I proposed to implement in the mail few weeks ago: http://permalink.gmane.org/gmane.comp.science.electromagnetism.meep.general/4959 However, I did not get any reply so far,

[Meep-discuss] New feature: band-pass source

Dear MEEP users, let me share a little code snippet with you. Sometimes it happens that one wants to run a FDTD simulation with a broadband source, which however avoids some frequencies. A single gaussian source is not useful in such case, as its spectrum has always broad wings. Composing the

Re: [Meep-discuss] New feature: band-pass source

Just for comparison, these are some spectra recorded using the old Gaussian source: http://fzu.cz/~dominecf/misc/meep/img/ampli_debug_gaussian.png The structure couples to the low frequencies and induces ugly artifacts by spectral leakage. And here are those obtained using the band source with

[Meep-discuss] Amplitude monitor plane for MEEP 1.3

Dear MEEP developers and users, in our team, we employ MEEP to solve various problems and it is very useful. However, now and then we encounter some important functions to be missing. Most of them may be somehow written in Python code, but they would be the most efficient if hard-coded in the C++

Re: [Meep-discuss] organic material in meep

Dear Gholamhosain, the permittivity has to be established from experimental (or quantum-mechanical) sources, see for instance http://xplqa30.ieee.org/ielx5/5503869/6055237/6004802/html/img/6004802-fig-2-large.gif This graph may be easily converted to numerical data using Engauge or similar

Re: [Meep-discuss] make a source like a lamp

Dear Allesio, as far as I know, the random white light sources such as a lamp are rarely used in simulations. If one wants to obtain the broadband spectra, there is nothing more convenient than exciting one ultrashort pulse, possibly even half-cycle. However, it should be also possible to generate

Re: [Meep-discuss] Porting MEEP to the Web

On Wed, May 22, 2013 at 3:43 AM, Filip Dominec filip.domi...@gmail.comwrote: Hi, I did not know this project before. What would be the greatest benefits for the user? Would it not impact the performance too much? Filip 2013/5/21, Fernando Carvalho fernandocarvalhocoe...@gmail.com: Hi everyone

Re: [Meep-discuss] Porting MEEP to the Web

Hi, I did not know this project before. What would be the greatest benefits for the user? Would it not impact the performance too much? Filip 2013/5/21, Fernando Carvalho fernandocarvalhocoe...@gmail.com: Hi everyone, Recently, Google Developers, at Google IO 2013, had announced PNaCl (Native

Re: [Meep-discuss] Compiling C++ - undefined reference

Hi, Chris, it seems to me you are missing the MEEP header files. In my opinion, the best way would be to compile your simulations against the newest version of MEEP available. Its straightforward compilation procedure (for Debian/Ubuntu) is documented in the blue box at

Re: [Meep-discuss] Calculating complex epsilon in MEEP 1.2

Hi, Kahli, few months ago, I needed to run some time-domain and frequency-domain simulations on the same structure, which contained dispersive materials. As MEEP does not accept dispersive model in frequency-domain computations yet, I had to compute the value of complex epsilon for each frequency

Re: [Meep-discuss] (no subject)

Hi, this is purely a mathematical question related to diffraction. Generally, if your source is ten times the wavelength, the output radiation divergence may be estimated to be one tenth of radian. So you have to make the source plane as big as possible. Another approach giving a precise plane

Re: [Meep-discuss] clueless newbie

Hi, Jonathan, writing a scheme script and running it as: meep script.ctl is definitely the preferred way to run any but the simplest simulation. The meep examples seem to not to be included in the debian package, but they are enclosed with the meep source code, whose latest version may be

Re: [Meep-discuss] how to install Meep on RedHat4 Linux Server

be interested in your results. F. 2013/3/28, Valery Kugel val...@juniper.net: Thank you Filip, do you think it will work in RH4 env? Valery - Original Message - From: Filip Dominec filip.domi...@gmail.com To: Valery Kugel val...@juniper.net Cc: meep-discuss@ab-initio.mit.edu Sent: Thursday

[Meep-discuss] Meep 1.2 with python-meep 1.4.2?

Dear Meepers, I am sorry for being overly active in this mailing list, but this question is very simple: Has anybody succeeded running python-meep above MEEP 1.2? It can be built, but at my computer it always failed with Unknown symbol error when I tried to import the meep module. The older

Re: [Meep-discuss] How to force the -fPIC option?

/python2.7/dist-packages/_meep_mpi.so: undefined symbol: _ZN3MPI3Win4FreeEv This is somehow related to the OpenMPI1.6 package I am using. I will try recompiling with another MPI package available in Ubuntu, such as OpenMPI or MPICH2. 2013/2/5, Filip Dominec filip.domi...@gmail.com: Dear MEEP users, I am

[Meep-discuss] How to force the -fPIC option?

Dear MEEP users, I am trying to compile the latest version of python-meep with MPI support from scratch. First I compiled meep-mpi (against MPICH2). It works fine and meep-mpi supports multiprocessing; but when it comes to compilation of python-meep with the command sudo ./make-mpi

Re: [Meep-discuss] segmentation fault in meep

Hi, first I would check if the ošidka segmentovanija (AKA segfault) persists when no harminv is used; second I would try to reduce the computation time. I had similar stability problem with long harminv runs: https://bugs.launchpad.net/python-meep/+bug/947884 Filip 2013/1/21, Alex

Re: [Meep-discuss] Setting conductivity

Hi, thanks to Shavkat and Martin, I made it work! The minimum code snippet is as such: class MyConductivity(meep.Callback): def __init__(self): meep.Callback.__init__(self) def double_vec(self, r): return 1e4 mc = MyConductivity() meep.set_COND_Callback(mc.__disown__())

Re: [Meep-discuss] MEEP-MPI

Hi, first of all a trivial question, do you import meep-mpi or just meep ? F. 2013/1/14, Rita Ribeiro ritbe...@gmail.com: Hi, I had installed python meep -mpi in Ubuntu 12.10 and when i execute the command mpirun -np 4 python name.py instead of getting one result i get 4. So each core

Re: [Meep-discuss] Python meep-mpi version

Hi, I solved the same problem. I needed to make a symlink /usr/include/meep to /usr/include/meep-openmpi (See also http://fzu.cz/~dominecf/misc/meep/index.html, section Installation.) Hope this helps, Filip 2013/1/10, Rita Ribeiro ritbe...@gmail.com: Hi, I am trying to install the meep-mpi

Re: [Meep-discuss] PML reflection problem

be interesting if a evanescent-wave-friendly (e. g. amplification-damping neutral) PML could be coded in MEEP in the future. I would be glad to read you thoughs! F. D. 2012/12/19, Filip Dominec filip.domi...@gmail.com: Hi, Ali, as I suggested, try to make a BIG spacing between your structure

Re: [Meep-discuss] PML reflection problem

On Mon, Dec 17, 2012 at 1:47 PM, Filip Dominec filip.domi...@gmail.comwrote: Hi, Ali, and all the MEEP users, first, I believe one should not place any material into the volume occupied by PML. However, what you report actually seems to be a much deeper problem in the PML

Re: [Meep-discuss] About error invalid boundary absorbers for this grid_volume

Hi, Mi, it seems to be just a little mistake in the units used for definition of the simulation. I always get this message when the PMLs are thicker than the simulation volume. F. 2012/11/15, Hongyi Mi h...@wisc.edu: Dear All, I am trying to simulation a 2D structure with dimension about 50nm

Re: [Meep-discuss] Python-Meep: Are there any equivalent functions?

Hi, * amp-function[function] should have its counterpart in the meep.amplitudeFactor() callback (see [1]) * probably answered in [1] as well (I am not sure), * sure, it is f.time(), where f = meep.fields(structure) * while (f.time() sim_time): f.step(); do_something You may be interested in the

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