Sensitivity analysis and optimization of sub-wavelength optical gratings using adjoints

Numerical optimization of photonic devices is often limited by a large design space the finite-differences gradient method requires as many electric field computations as there are design parameters. Adjoint-based optimization can deliver the same gradients with only two electric field computations....

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Bibliographic Details
Published inOptics express Vol. 22; no. 11; pp. 12971 - 12981
Main Authors Niederberger, Armand C R, Fattal, David A, Gauger, Nicolas R, Fan, Shanhui, Beausoleil, Raymond G
Format Journal Article
LanguageEnglish
Published United States 02.06.2014
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Summary:Numerical optimization of photonic devices is often limited by a large design space the finite-differences gradient method requires as many electric field computations as there are design parameters. Adjoint-based optimization can deliver the same gradients with only two electric field computations. Here, we derive the relevant adjoint formalism and illustrate its application for a waveguide slab, and for the design of optical sub-wavelength gratings.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.22.012971