Abstract
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.
Original language | English |
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Pages (from-to) | 3929-3932 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 46 |
Issue number | 16 |
DOIs | |
State | Published - 15 Aug 2021 |
Externally published | Yes |