Rigorous Analysis of Resonant Waveguide Gratings
Abstract
Resonant waveguide gratings (RWG), due to their tunability in e.g. wavelength, phase, and polarization, are applied in research and industry for various purposes. The structure of an RWG contains a thin high-refractive-index waveguide film that is in contact with a grating. The waveguide supports several guided modes, and, depending on the thickness, the number of modes varies. In this example, we apply the Fourier modal method (FMM) within VirtualLab Fusion to analyze the property of RWG rigorously.
VirtualLab Fusion Configuration
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VirtualLab Fusion
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Grating Package
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Use Case
Analysis of Slanted Gratings for Lightguide Coupling
Different slanted grating geometries are selected from literature, with varying slant angle, fill factor, and modulation depth, and the diffraction efficiencies are calculated with the Fourier modal method (FMM).
Use Case
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The polarization-dependent properties of ultra-sparse dielectric nanowire grids are analyzed by using the Fourier modal method (FMM, also known as RCWA).
Tutorial
Grating Order Analyzer
In VirtualLab Fusion, the Grating Order Analyzer can be used for convenient grating diffraction analysis, with results presented in various ways.