Features

Electromagnetic Template Library (EMTL) is a С++ library for programming Finite-Difference Time-Domain (FDTD) simulations.

The program is designed for quick and efficient programming of FDTD simulations and for extending the available FDTD algorithms with new techniques and features. The code implements a fully functional API including MPI parallelization.

Code Features

Computational technology and efficiency

• Compilation on UNIX and Windows
• User API in C++ and Python
• MPI parallelization
• OpenMP parallelization
• SIMD vectorization (HiFDTD extension)
• Memory-efficient asynchronous updates (HiFDTD extension)

Simulation techniques

• Anisotropic and dispersive media
• Total-Field / Scattered-Field wave generation technique
• Dipole sources
• Subpixel smoothing
• Perfectly mathed layer absorbing boundaries (UPML and CPML)
• Fast Fourier transform of the results
• Near-to-Far-Field Transformation
• Simulation of Maxwell-Bloch equations
• Coupled electromagnetic and electrical simulations.

New algorithms Subpixel smoothing for conductive and dispersive media: http PDF Iterative technique for analysis of periodic structures at oblique incidence: http PDF Hybrid transfer-matrix FDTD method for layered periodic structures. This method can be used for calculation of transmission and reflection for planar layers of scatterers, and band structure of photonic crystals: http PDF Additional back absorbing layers technique to reduce numerical reflection from PML: http PDF Simulation of Maxwell-Liouville equations for single quantum emitters in FDTD http PDF

Oblique incidence simulation

Capabilities

• Calculation of the distribution of electromagnetic fields in a structure;
• Real-time simulation of the propagation of electromagnetic wave packet through a structure;
• Calculation of the transmission, reflection, and absorption coefficients as functions of incident wavelength and angle for periodic structures;
• Calculation of the scattering cross-section and the angle distribution of the scattered wave for objects of arbitrary shape;
• Sensitivity analysis of the impact of defects on the optical properties of periodic structures (photonic crystals);
• Calculation of transfer-matrix (T-matrix) for planar layers of arbitrarily shaped scatterers.

Applications

Photonic crystals, optical filters, antireflective coatings; Waveguides and resonant cavities; Design of electronic devices, including nanosized devices; Antenna and mobile phones design, etc.