The Meep Scheme tutorial provides further usefulįor a more detailed explanation of our configuration files and the physical background, please see my dissertation thesis. the MayaVi or ParaView visualisation application. $ h5topng -S2 -x INDEX -c hot e_real2_p-000001500.h5Ī VTK file can be opened by e.g. # slice transversal to the incident propagation axis with INDEX specifying the slice index This repository is structured as follows: With regards to their scriptability, together with the ease and widespread use of the powerful Meep tool, these scripts can easily be adapted to other and possibly more complicated beam/interface setups. Originally, these files have been used in studying optical beam shifts providing independent numerical simulations.
79, 065601, 2011 provides a different case where PML fails.FDTD simulation of reflection and refraction of polarised optical beams at plane and curved dielectric interfaces based on Meep as underlying FDTD simulation software package. This occurs most notably in periodic media like photonic crystals, where the fundamental idea behind PML breaks down. 11376-92, 2008 on the use of adiabatic absorbers as a workaround for cases when PML fails.
PML has some limitations, as is discussed in the Notes on PMLs linked above. This paper also describes a strategy to validate PML. Johnson: a description of the precise PML formulation that is used in Meep, which is slightly different from many PML formulations described elsewhere in order to properly handle arbitrary anisotropy a closely related formulation with slightly different notation is described in J. Notes on the UPML implementation in Meep by S.Johnson: a general introduction to PML concepts
The approach involves surrounding the computational cell with a medium that in theory absorbs without any reflection electromagnetic waves at all frequencies and angles of incidence.
The perfectly matched layer ( PML) approach to implementing absorbing boundary conditions in FDTD codes was proposed in J. Tutorial/Multilevel Atomic Susceptibility.Tutorial/Resonant Modes and Transmission in a Waveguide Cavity.Tutorial/Ring Resonator in Cylindrical Coordinates.Synchronizing the Magnetic and Electric Fields.