Hi Gonzague,
Try look at the Lithium Niobate implementation in the materials library:
https://github.com/NanoComp/meep/blob/e9251c32bef33eee05994872b07803b159e9f8b6/python/materials.py#L1027-L1064
.
As you'll see, it's pretty straightforward to do what you wish.
Thanks,
Alec
On Tue, Jul 16, 20
Dear all,
I am trying to define a material that conbine birefringence (via
eps-diag) and dispersive properties (via E-susceptibilities).
I wonder if there is a way in meep to do that.
Thanks
Gonzague
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egards
Mohammad
From: mahdiyeh tajabady
To: meep-discuss@ab-initio.mit.edu
Sent: Wed, October 13, 2010 9:02:38 PM
Subject: [Meep-discuss] dispersive material
Dear Dr. Steven and meep users,
I tried to find properties of dispersive material. I have some experimental
data
which I us
Dear Dr. Steven and meep users,
I tried to find properties of dispersive material. I have some experimental
data which I used them to find properties from analytical approach. it works
well for materials with low dielectric constant like 2 or even 4 but it did not
works for very dispersive mate
Hi Sadovnikov,
thanks for your answer! you can find the values I'm talking about
here: http://ab-initio.mit.edu/wiki/index.php/Dielectric_materials_in_Meep
so my dimension unit is 1cm, so my freq unit is c/a=30GHz.
from http://ab-initio.mit.edu/wiki/index.php/Dielectric_materials_in_Meep
my param
Dear Matteo,
what is gamma?
I try to suppose that with omega and eps all is ok)
Sasha
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Hi everybody,
I'm very very confused about how to specify correctly the parameters
for my dispersive material. My unit is a=1e-2m and the data about my
material is (before any conversion for Meep):
epsilon_inf = 6.75
omega_n = 1e12
gamma = -1.01e13
delta-epsilon = sigma (for newer versions) = 47.9
Hi,
I am trying to add dispersion to Meep's C++ interface.
In Meep tutorial there is an example about dispersion:
s.add_polarizability (one, 0.4, 0.01, 27.63);
There is no matching function in C++ class:
meep::structure::add_polarizability (
double sigmaconst vec &,
field_type ft,
double ome
i didn't find the 'cause' of the problem, but if you reduce the
strength of the PML down to 0.1 from the default value of 1, it
doesn't blow up. it also appears that you need to increase the size of
the PML. finally, it appears to be dependent on the actual parameters
you use for the disper
That is exactly the problem I have mentioned in my last post:
http://ab-initio.mit.edu/pipermail/meep-discuss/2008-December/002343.html
And I have tested your scripts in my computer, using both 0.10.2 and 0.20.3.
In 0.10.2 everything is OK, but when using 0.20.3, the problem you
mentioned occure
--
below is a 2d calculation. it's simply a metal slab, a point source
and a pml around the entire domain.
if the metal slab is 'metal', there is no problem.
if the metal slab is a dispersive material ('al_mat' below) then only
if the source is Ez is the simulation stable. otherwise th
Dear Steven and meep users.
I have been conducting some simulations by meep, and I have some problems with
dispersive material.
1. In "Materials in Meep
(http://ab-initio.mit.edu/wiki/index.php/Materials_in_Meep)", in order to use a
medium with eps=3.4+j0.101 at a frequency 0.42 , you say tha
Dear Steven and all meep users,
We are doing subwavelength research, and have used our
self-development FDTD 2D code to do our simulation in which we use "Drude
model" to describe a dispersive material (Referred to Allen Taflove, 3rd
Edition).
Recently, when we used meep, we've found the
On Thu, 25 Jan 2007, xqhuang wrote:
Dear Steven and others,
When I calculate the dispersive material, why the output of the
structure are all black? In this case, are there any ways to see the
field patterns of the dispersive material?Thanks in advance!
Possibly something is blowing up? Or
Dear Steven and others,
When I calculate the dispersive material, why the output of the structure are
all black? In this case, are there any ways to see the field patterns of the
dispersive material?Thanks in advance!
Best Regards,
Huang___
meep-dis
On Tue, 1 Aug 2006, Bryce wrote:
I've been working on simulating a non-ideal metal, and it seems to run
well with my calculated polarizations if I choose n>=1. However, there
seems to be a limit on how low I can make n. At my wavelength of
interest, Ag has n=0.226, and I can't go below about
I've been working on simulating a non-ideal metal, and it seems to run well
with my calculated polarizations if I choose n>=1. However, there seems to
be a limit on
how low I can make n. At my wavelength of interest, Ag has n=0.226, and I
can't go below about n=0.6 without the simulation "blowin
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