Abstract
Scalar theory is a simple and rapid method to analyse and conceive diffractive optical element and gratings, in some limited cases. When we want to deflect wave fronts with large angles (for telecommunication devices, for instance) or when the features of the grating are around the order of the wavelength, scalar optics fail to be accurate, then adapted rigorous electromagnetic tools must be used. To correct the increasing cost in memory saving and time consuming with the size of the grating, we present here an original `field stitching' method adapted for aperiodic gratings (FSA). This method, initially developed for periodic gratings is extended here to analyse locally and rigorously aperiodic gratings with large sizes and small features without having some of the above-mentioned inconvenients.
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Lo, M., Meyrueis, P. Locally rigorous electromagnetic analysis of non-periodic gratings with large size and small features in the non-scalar validity domain by the field stitching method. Optical and Quantum Electronics 32, 691–699 (2000). https://doi.org/10.1023/A:1007050008625
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DOI: https://doi.org/10.1023/A:1007050008625