Bin,
Your timing is fortuitous. We are in the midst of finalizing a release
that incorporates support for multilevel atomic media having an
arbitrary number of levels, coupling matrix and inter-level transitions
(generalizing the result from the Bermel et al. paper that you
referenced). The next Meep release consolidates the dispersive
polarization class succinctly into just one file which now unfortunately
is scattered over multiple files in the source code (boundary
conditions, timestepping, etc). We have removed all of the old code and
rewritten large parts of it into a single new "susceptibility" class
which contains all of the information needed for any kind of dispersive
susceptibility. We even have a Scheme front end interface for this
feature and will include an example of its usage in the tutorial section
of the wiki when it is finally released. Currently, we are testing and
debugging this feature and hope to have it released soon.
Please be patient as we finalize this.
Ardavan
Bin Huang wrote:
Hi,
Thanks for your reply again.
You got me right.
1) Now I am having a hard time trying to figure out how the Scheme objects are linked to C++ classes. Which files do I need to add the definition for ActiveRegion class?
2) After that, I need to figure out where to add the additional solver into the
existing C++ code. I am going to define an active region between the cavities
and solve the additional equations in this paper together with the Maxwell
Equations:
Active materials embedded in photonic crystals and coupled to electromagnetic
radiation (Pater Bermel et al).
I would be really grateful if the original meep developers can enlighten me a
little bit on this.
--
Bin Huang (Bryan)
MIT Graduate Student '10
Computation for Design and Optimization
(+65)98947649
________________________________________
From: Nizamov Shawkat [[email protected]]
Sent: Monday, September 13, 2010 2:41 AM
To: Bin Huang
Cc: [email protected]
Subject: Re: [Meep-discuss] MEEP development
Hi!
If I correctly understand you, you want to extend the simulation and
perform custom specific fields calculations, made on specified
regions, along the FDTD calculations.
In this case you have several choices, all of them are undocumented,
but may be figured out looking through sources. If you deliberately
want to use Scheme for this, I think you have to figure the correct
sequence of timestepping code, implement it in Scheme and perform your
code when appropriate. You may also locate the timestepping code in
the C++ library and insert the callback for external procedure in
Scheme, but it is quite challenging.
All C++ implementation would be much easier.
Maybe meep developers can suggest better approaches ?
Hope it helps,
Shavkat Nizamov
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