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

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Abstract: 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.

11 pages

  • External Posting Date: February 21, 2014 [Fulltext]. Approved for External Publication
  • Internal Posting Date: February 21, 2014 [Fulltext]

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