Photonic Crystal

Finite-Difference Time-Domain Simulation

OptiFDTD provides two simulation engines for modeling photonic crystal devices and corresponding defects:

1) 2D and 3D FDTD simulation to study the field response and transmission/reflection spectrum;
2) PWE method to perform band-diagram analysis for 1D, 2D and 3D photonic crystal devices.

Photonic Crystal (FDTD)



  • Photonic Crystal Fiber
  • Optical Waveguide
  • Laser Emission
  • Optical Sensor



Photonic Crystal Layout




FDTD - Photonic Crystal Layout





  • Reduce simulation size by using plane wave excitation and periodic boundary conditions
  • Advanced modeling to achieve design goals quickly and efficiently, which significantly reduces product development cost
  • Ability to take advantage of systems with multiple CPUs using multi-threading technology
  • Built in PBG editor to define lattice relation
  • Design creation in 2D and 3D
  • PWE band solver
  • Additional tool boxes allow the simulation input and output to be linked to other optical tools such as Zemax or Code V
  • 64-bit capable
  • Linux simulator available









Simulation Description

Most photonic crystals have a periodic lattice, which allows users to reduce the simulation size by using plane wave excitation and PBC boundary conditions. During simulation, the real-time propagation can be viewed in both 2D and 3D.



The diagram below shows the 3D wave propagation.




FDTD - 3D Wave propagation




Observation points can be analyzed in real-time. Below is the reflected electric field in black and the transmitted field in blue.




FDTD - Reflected electric field in black and transmitted field




After simulation, transmission and reflection functions can be plotted.




FDTD - Transmission and reflection functions




PWE Bandsolver



Allows users to identify band gaps that exist within the photonic crystal structure. The band solver works in either 1, 2, or 3-dimensions.



The diagram below is a graph populated with a set of eigen-frequencies provide a clear picture of the band diagram allowing users to identify band gaps.




FDTD - Eigen-frequencies




OptiFDTD Manuals

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