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An analytically simple and computationally efficient Gaussian beam mode-decomposition approach to classical diffraction theory

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posted on 2023-11-30, 06:28 authored by Zhihao Xiao, R. Nicholas Lanning, Mi Zhang, Irina Novikova, Eugeniy E. Mikhailov, Jonathan P. Dowling
We present a method of Gaussian-beam-mode decomposition to calculate classical diffraction of optical beams by apertures. This method offers a entirely different approach to examine the classic problem. Although our method is based on a very straightforward setup, it is surprisingly effective. We validate our method by comparing its results with those of Kirchhoff's full diffraction formula. Not only does our method have a simple and organized analytical framework, it also offers significant computational advantage.

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