Diffraction efficiency optimization for multilayered parametric holographic gratings
| Autor: | Carlos Jerez-Hanckes, José Pinto, Rubén Aylwin, Gerardo Silva-Oelker |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Diffraction
Physics Spatial filter business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Holography Physics::Optics Diffraction efficiency Atomic and Molecular Physics and Optics law.invention Optics law Trigonometric functions Gradient descent business Diffraction grating Parametric statistics |
| Zdroj: | Optics letters. 46(16) |
| ISSN: | 1539-4794 |
| Popis: | Multilayered diffraction gratings are an essential component in many optical devices due to their ability to engineer light. We propose a first-order optimization strategy to maximize diffraction efficiencies of such structures by a fast approximation of the underlying boundary integral equations for polarized electromagnetic fields. A parametric representation of the structure interfaces via trigonometric functions enables the problem to be set as a parametric optimization one while efficiently representing complex structures. Derivatives of the efficiencies with respect to geometrical parameters are computed using shape calculus, allowing a straightforward implementation of gradient descent methods. Examples of the proposed strategy in chirped pulse amplification show its efficacy in designing multilayered gratings to maximize their diffraction efficiency. |
| Databáze: | OpenAIRE |
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