Binary gratings, with either straight or slanted side walls, have turned out to be the key components in many optical applications. Thanks to the advances in e.g. nanoimprint technology, the fabrication of this type of gratings with small, critical dimensions has become feasible. VirtualLab Fusion, with its inbuilt Fourier modal method (FMM, also known as RCWA) and different optimization algorithms, provides a complete user-friendly design workflow for binary gratings that also includes the subsequent analysis of fabrication errors, like rounded-edge effects.
Analysis and Design of Highly Efficient Polarization Independent Transmission Gratings
We demonstrate how to rigorously analyze the polarization-dependent properties of binary gratings; also how to optimize the binary structures to obtain high polarization-independent diffraction efficiency.
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Parametric Optimization and Tolerance Analysis of Slanted Gratings
A slanted grating is optimized with the Fourier modal method (FMM) to achieve high diffraction efficiency for coupling light into waveguides. Fabrication tolerances, like rounded edges, are analyzed.
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