Sensitivity Analysis and Optimization of Sub- wavelength Optical Gratings Using Adjoints

Niederberger, Armand C. R. ; Fattal, David A. ; Gauger, Nicolas R. ; Fan, Shanhui ; Beausoleil, Raymond G.

HP Development Company

关键词: simulation;    optimization;   

RP-ID  :  HPL-2014-16

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

Numerical optimization of photonic devices is often limited by a large design space: the conventional 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.