Structural Optimization of a One-Dimensional Freeform Metagrating Deflector
via Deep Reinforcement Learning

Demo

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  Silicon

  Air
Wave Length [nm]
900
Angle [°]
50


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η : 98.74681%

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ACS Photonics publication


The increasing demand on a versatile high-performance metasurface requires a freeform design method that can handle a huge design space, which is many orders of magnitude larger than that of conventional fixed-shape optical structures. In this work, we formulate the designing process of one-dimensional freeform Si metasurface beam deflectors as a reinforcement learning problem to find their optimal structures consistently without requiring any prior metasurface data.

Optimized Structures


[Optimized structure]This is the optimized structure proposed in the paper. Si is represented by blue cell, and air by white cell.
Wave Length : 900nm, Angle : 50°