Meep FDTD Publisher's description
from Steven G. Johnson
Meep FDTD is a free finite-difference time-domain (FDTD) simulation software package developed at MIT to model electromagnetic systems, along with our MPB eigenmode package
Meep (or MEEP) is a free finite-difference time-domain (FDTD) simulation software.
Meep FDTD is a free finite-difference time-domain (FDTD) simulation software package developed at MIT to model electromagnetic systems, along with our MPB eigenmode package.
Here are some key features of "Meep FDTD":
В· Free software under the GNU GPL.
В· Simulation in 1d, 2d, 3d, and cylindrical coordinates.
В· Distributed memory parallelism on any system supporting the MPI standard. Portable to any Unix-like system (GNU/Linux is fine).
В· Dispersive (including loss/gain) and nonlinear (Kerr) materials.
В· PML absorbing boundaries and/or perfect conductor and/or Bloch-periodic boundary conditions.
В· Exploitation of symmetries to reduce the computation size - even/odd mirror symmetries and 90/180 rotations.
В· Complete scriptability - either via a Scheme scripting front-end (as in libctl and MPB), or callable as a C++ library.
В· Field output in the HDF5 standard scientific data format, supported by many visualization tools.
В· Arbitrary material and source distributions.
В· Field analyses including flux spectra, frequency extraction, and energy integrals; completely programmable.
В· Multi-parameter optimization, root-finding, integration, etcetera (via libctl).
A time-domain electromagnetic simulation simply takes Maxwell's equations and evolves them over time within some finite computational region, essentially performing a kind of numerical experiment. This can be used to calculate a wide variety of useful quantities, but major applications include:
В· Transmission and reflection spectra - by Fourier-transforming the response to a short pulse, a single simulation can yield the scattering amplitudes over a wide spectrum of frequencies.
В· Resonant modes and frequencies - by analyzing the response of the system to a short pulse, one can extract the frequencies, decay rates, and field patterns of the harmonic modes of a system (including waveguide and cavity modes, and including losses).
В· Field patterns (e.g. Green's functions) in response to an arbitrary source, archetypically a CW (fixed) input.
Using these results, one can then compute many other things, such as the local density of states (from the trace of the Green's function). Meep's scriptable interface makes it possible to combine many sorts of computations (along with multi-parameter optimization etcetera) in sequence or in parallel.
What's New in This Release:
В· Enable correct operation and passed test suite when MEEP_SINGLE (single-precision) mode is enabled in meep.hpp; thanks to Seyoon Kim for the bug reports.
В· Use new automake features to have less-verbose build output by default (you can build in verbose mode by make V=1), and running all test programs then reporting which ones failed instead of stopping at the first failure.
В· Fix superficial failure in 2D_convergence test under gcc 3.4.6; thanks to Alex Prengel for the bug report.
В· Fix failure in flux test under gcc 4.3.1 in some cases; thanks to Alex Prengel for the bug report.
System Requirements:No special requirements.
Program Release Status: Minor Update
Program Install Support: Install and Uninstall