![]() ![]() ![]() Project files for three sample geometries are provided in this example. We identify the bands by finding the resonant frequencies of the fields that persist in the simulation. At all other frequencies, the fields will quickly disappear due to destructive interference. band) exists, the fields will propagate indefinitely. The wave vector k is specified by the Bloch boundary conditions, which means one simulation per k-vector is required. To calculate bandstructure using FDTD, we excite all possible modes of the system by using multiple randomly placed broadband dipoles. Understand the simulation workflow and key results Understanding and controlling the bandstructure of photonic crystals is a key part of the design process. Photonic crystals and other periodically structured materials are used in a variety of applications including LEDs, optical fibers, displays, solar cells, etc. This example shows how to calculate the bandstructure of rectangular 2D and 3D photonic crystals using FDTD. ![]()
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