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Inverse design of diffractive optical elements using step-transition perturbation approach

Inverse design of diffractive optical elements using step-transition perturbation approach AbstractDiffractive optical elements are ultra-thin optical components required for a variety of applications because of their high design flexibility. We introduce a gradient-based optimization method based on a step-transition perturbation approach which is an efficient approximation method using local field perturbations due to sharp surface profile transitions. Step-transition perturbation approach be available to calculate the gradient of figure of merit straightforwardly, we implemented optimization method based on this gradient. This fast and accurate inverse design creates binary (2-level) diffractive elements with small features generating the wide angle beam arrays. The results of the experimental characterization confirm that the optimization based on the perturbation method is valid for 1-to-117 fan-out grating generating beam pattern of linear array. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Advanced Optical Technologies de Gruyter

Inverse design of diffractive optical elements using step-transition perturbation approach

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References (26)

Publisher
de Gruyter
Copyright
© 2020 Dong Cheon Kim et al., published by De Gruyter, Berlin/Boston
ISSN
2192-8584
eISSN
2192-8584
DOI
10.1515/aot-2020-0046
Publisher site
See Article on Publisher Site

Abstract

AbstractDiffractive optical elements are ultra-thin optical components required for a variety of applications because of their high design flexibility. We introduce a gradient-based optimization method based on a step-transition perturbation approach which is an efficient approximation method using local field perturbations due to sharp surface profile transitions. Step-transition perturbation approach be available to calculate the gradient of figure of merit straightforwardly, we implemented optimization method based on this gradient. This fast and accurate inverse design creates binary (2-level) diffractive elements with small features generating the wide angle beam arrays. The results of the experimental characterization confirm that the optimization based on the perturbation method is valid for 1-to-117 fan-out grating generating beam pattern of linear array.

Journal

Advanced Optical Technologies – de Gruyter

Published: Feb 23, 2021

Keywords: diffractive optical elements; fan-out gratings; gradient-based optimization; inverse design; step-transition perturbation approach

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