Diffraction Angle Calculator
Abstract
The defining characteristic of diffraction gratings is the periodicity of their structure which, as predicted by Fourier theory, causes incident light to be split into a discrete set of orders, both in transmission and reflection. How many of these propagating orders there are, as well as the deflection angle of each of them, depends on the wavelength of the radiation, the refractive indices of the media in front of and behind the grating, the period of the structure, and the angle of incidence. This dependence is mathematically encoded in the grating equation. In this use case we present the Diffraction Angle Calculator of VirtualLab Fusion, a convenient tool for calculations involving the grating equation.
VirtualLab Fusion Configuration
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VirtualLab Fusion
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Grating Package
Are you interested in further reading?
Tutorial
Analysis of Blazed Grating by Fourier Modal Method
The Fourier modal method (FMM) can be used to analyze grating efficiencies rigorously in VirtualLab Fusion.
Use Case
Thin Element Approximation (TEA) vs. Fourier Modal Method (FMM) for Grating Modeling
Two commonly used, but very different algorithms for the analysis of diffraction efficiencies of gratings are investigated: TEA and FMM.