A sinusoidal source of light of free space wavelength 1.753 microns is excited at the left end of the straight waveguide as a line source along the width of the waveguide. A.1 TRANSLATING THE DISCRETE FDTD EQUATIONS TO A HIGH-LEVEL. The surrounding area is free space of relative permittivity 1. Both the waveguides are made of material of relative permittivity 6. A 450 nm thick ridged circular waveguide with a central radius of 1 micron is placed at a distance 100nm below the straight waveguide. In this program, a 3.05 micron X 3.6 micron domain is taken with a 450 nm thick horizontal straight waveguide placed in the upper part at a distance of 300 nm from the top. GMES is a free finite-difference time-domain (FDTD) simulation Python package developed at GIST to model photonic devices.Its features include simulation in 1D, 2D, and 3D Cartesian coordinates, distributed memory parallelism on any system supporting the MPI standard, portable to any Unix-like system, variuos dispersive () models, CPML absorbing boundaries and/or Bloch-periodic boundary. Indian Institute of Technology Madras (IITM) Works well for free-form scatterers with constant permittivities, permeabilities and conductivities. Total Field/Scattered field (TF/SF) interface for plane EM-waves scattering problems investigations. Uniaxial PML absorbing border conditions, 3. Computational Electromagnetics, Fall 2011 2D FDTD code with TF/SF interface and UPML absorbing borders.
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