Dear friends,
I'm trying to change the structure during the simulation. The code below is
one example. This code gives me a big error message. What is wrong with it?
res = 40 # pixels/um (originalmente, 20)
eps = 9 # dielectric constant of the hole
r = 0.4 #
Good morning
I am a beginner in Meep. Currently, I am trying modifying
the simulation in Eigenmode source tutorial reported in
meep documentation.
Here I report the code I am using
import meep as mp
import numpy as np
import matplotlib.pyplot as plt
w = 5 # width of waveguide
Hi John
Please have a look at the attachment. I have two different duplications and
the defects are in the duplications. If I re-run I get the same defects at
the same positions. Is this the problem you are facing? I have plotted
with pyplot and also with Mathematica, no difference at all. I
Hi Galaa,
I’ve seen similar things, large isolated, unphysical excursions in otherwise
perfectly reasonable results when plotting data from a meep output. Are you
using Matplotlib/pyplot for your plotting routines? And do the excursions
appear at exactly the same points and with the same
Hi All.
I am new to MEEP and trying to use the "geometric_objects_duplicates"
feature. After simulation complete, I extracted the dielectric spatial
profile with "data=sim.get_array(center=mp.Vector3(),
size=mp.Vector3(0.0,0.0,height), component=mp.Dielectric)" to double check
my geometry but I
Hi https://goo.gl/DSTCVJ
Gustavo
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Dear meep users,
I just don't know why there is not Si in the material library,it is a very
common material.And I found the refractive index in Medium is
frequency-independent ,does this mean that refractive index does not change
with wavelength?It does not make sense,and how can i define Si
Dear Professor,
Good day.
I am a fresher to meep and don't it's operating mechanism very well,so some
basic problems is always persecuting me.I just want to know how to calculate
the transmission efficiency of a straight waveguide the MEEP Documentation
mentions at python tutorial .
Thanks
Hey
https://goo.gl/c8AcQg
Gustavo
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(set! k-point 1 1 0) will set bloch vectors as (1 0 0) (0 1 0) or (1 1 0)?
What is the difference between (set! k-point 0 0 0) and (set! k-point 1
1 0) ?
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Hi meep users
Am working on ring resonators comprising of two straight parallel waveguides
and a single ring, the input is in one of the straight waveguides , the
coupling is taking place well but what is missing is how the drop port comes in.
any assistance is highly appreciated.
thanks in
Dear Steven and other Meep users,
I am doing a simulation in which I require to use a complex dielectric constant
of the form(say for example):
epsilon = 1 + 0.01i
For my simulation the frequency isn't fixed, instead I have to use a gaussian
source with some finite width.
And in the whole
Dear Shampy,
this topic has been discussed many times. Generally you can not force
a complex value of permittivity in FDTD. You can however define a
high-frequency oscillator that introduces losses.
More on this topic is at
http://ab-initio.mit.edu/wiki/index.php/Dielectric_materials_in_Meep
or
On Apr 18, 2014, at 10:12 AM, ISAAC MATERE matere.is...@yahoo.com wrote:
hallo meep users
can coupling two
straight waveguides and a microdisc be done in meep,
Yes.
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hallo meep users
can coupling two
straight waveguides and a microdisc be done in meep, if so kindly assist
matere i
University of Eldoret
Msc student in Fibre Optics
Po Box 1125 - 30100
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Dear all,
I would like to model the radiation transfer between two plates
separated by nano-gap in which we have to bring near-field radiation
effects into account using fluctuational electrodynamics.
Does MEEP is capable of solve such problems? or we need to
manipulate the source C++ codes
Dear Farhad,
I am not an expert nor I have thoroughly read the referred article,
but I believe the non-radiative fields should be exactly modelled by
MEEP as long as they are a solution of the (source-free) Maxwell
equations. You may, for example, define a metallic capacitor and a
metallic
Dear Farhad,
from what I recall from tinkering the sources, you will probably want
to edit the polarizability.cpp. First of all, there already _is_ a
model that includes some random fluctuations; it might suit your
needs. If not, modifying the code that implements constitutive
relations is the
Hi meep user
Can I define two different polarized sources in the same structure?
Is it possible to launch two different polarized (TE and TM) sources in 2D
structure?
is it possible to have both polarizations present at the same time in Meep?
I want to simulate 2D structure with these sources
Dear meep users and Prof. Steven Johnson
In the section Using experimental Kerr coefficients of Units and
nonlinearity in Meep it is mentioned to use μm as unit of distance and W
as units of power. Does it mean that we have to include a=1 μm (or, a=1e-6)
in the .ctl file. If so then what
I'm a student, and my major is Geophysics. I have seen the examples , they are
all about small things. Can I use the Meep to simulate the electromagnetic
field of the earth ?
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Hello,
How can I define a short laser pulse with a very small solid angle (obviously)
in MEEP? When I am using a gaussian source I get the source, that is shining in
all directions and not in one direction.
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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
Dear meep users and Prof. Steven Johnson
i am new to meep. i am trying to simulate the transmission spectrum
of a finite 3D pc slab containing holes in square arrangement in which
third order nonlinearity is created by incidenting picosecond
ultrashort pulses from the top of the slab and
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http://dwelle.org/feeds/templates/headlinebox/tamro.html
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http://winkelmanndesigns.com/ski/local/combined/mylove.php?Dr176.bmp
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Hi,
I'm new to meep I have a question about simulation .My question is that how can
I simulate Lorentz medium and what algorithm it uses for this simulation (ADE
or Z-transform)?
thanks
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Dear MEEP’s,
I am a new user of MEEP and MPB software’s, how to install these software’s.
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Hi,
This is Hodjat Hajian, a PhD candidate of Solid State Physics, The University
of Tabriz, Tabriz, Iran. I have one question about the applications of the
meep software. Please answer to my question. The question is as below:
1) Can we do the below calculations for the slab photonic crystals
Dear Meep users,
I am trying to simulate transmission or reflection flux of solar
spectrum AM1.5 from a multilayer mirror. does anyone know how can I
simulate solar spectrum?
Best
Mahdieh
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Can't you just make a normal transmission and reflection spectrum of your
structure, and then multiply by the shape of the desired input spectrum?
Good luck!
On Sun, Sep 12, 2010 at 9:28 AM, mahdiyeh tajabady mtajab...@yahoo.comwrote:
Dear Meep users,
I am trying to simulate transmission or
Hello Prof. Johnson and MEEP users,
I tried to calculate the
transmission/refection of a 2D photonic crystal slab by following the
tutorial. However, the obtained spectra are not correct: T+R1
(oscillation) as shown in the attached figure. My CTL file is enclosed
below. In brief, the
hi i am simulating photonic crystal (PhC) slab lenses. the structure consists
of a triangular lattice of cylindrical holes with radius r=0.4a in dielectric
with permittivity e=12.96. in this PhC slab at frequency f=0.3, PhC exhibits
negative effective index. These application of this type of
On Jul 8, 2009, at 10:45 PM, 刘荣鹃 wrote:
It donesn't work and shows 'ERROR: Unbound variable: mu-diag'
Is it the problem from the meep version 0.20.3 I used?
Yes, you need Meep 1.0 or later for this feature.
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Hi, everybody. Hi, Shawkat.
Check if libiconv, libtool, gmp-devel packages are in your system.
It was the similar problem, when I recently try to
compileinstall libClt package.
With Respect,
Alexandr.
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Steven G. Johnson:
Hi Meep users,
I am relatively new to meep. Could anyone show me how to employ the
perfect-electric-conductor/ perfect-magnetic-conductor/metal boundary
condition in meep? I could not find an example in the meep-examples and
everything I tried seems to have the wrong syntax.
Thanks, Yonatan.
Hi,
Have a look at this thread:
http://www.mail-archive.com/meep-discuss@ab-initio.mit.edu/msg00412.html
Best,
Matt
On Mon, 2 Feb 2009, Sivan, Yonatan wrote:
Hi Meep users,
I am relatively new to meep. Could anyone show me how to employ the
perfect-electric-conductor/
Hello!
I have a question about MPI on intel-quad and intel-core2duo processors:
can we achieve more productivity by use mpi-support (e.g. lam-mpi pack) with
mpb program?
Thank you.
Sasha
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Hello,
I'm having trouble whenever I run my program I'm getting this error ERROR:
Unbound variable: D-conductivity
when I deleted everything related to D-conductivity in my program it was
running fine. Can you help me how to represent this term in Meep (I used the
formula provided in meep
Try adding the -pthread and -lpthread options to your compilation
command line
-- Manoj
Mani Chandra wrote:
Hi!
After resolving the eps() issue the pthread thing cropped up
again!...Initially I thought it was because I commented out some lines
but this time it's appearing even when I try
-pthread and -lpthread worked??ThanksMani chandra--- On Sun, 13/1/08, Manoj Rajagopalan [EMAIL PROTECTED] wrote:From: Manoj Rajagopalan [EMAIL PROTECTED]Subject: Re: [Meep-discuss] (no subject)To: meep-discuss@ab-initio.mit.eduDate: Sunday, 13 January, 2008, 8:21 PMTry adding the -pthread and -lpthread
Hello,
I met a problem during calcluating the transmission spectrum of 3D PC using me
ep.The band gap is about 10.9GHz ～16GHz. When I set fcen (the central frequency
) as 11GHz and 12GHz and set df as 0.1, I can obtain a covergent solution. But w
hen I increase fcen to 13GHz, 14GHz, and 15GHz,
Hello to all,
I want to simulate the transmission through a 3D PhC and I 'll use a source
with a various directions (for example (111) direction). I try this guile code,
but it doesn't works.
...
;-
Hi,
I still have problem with this. I want to wait a certain time for the
pulse to arrive
somewhere, and then wait for the decay of the field. I try this
(important part is the
definition of mystop):
(set! resolution 10)
(define-param sx 10)
(define-param sy 2)
(set! geometry-lattice (make
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