Tessa is a three-dimensional simulation software for optical systems at
the wavelength scale, based on the finite differences time-domain method
(FDTD). It focuses on simulating large, resonating structures, but can
also be used to study propagating beams. It can simulate arbitrary
dielectric and absorbing materials, and can be used on single
workstations as well as clusters.
This package is built with MPI support, using the LAM implementation.