High-efficiency, large-area, topology-optimized metasurfaces

Thaibao Phan; David Sell; Evan W. Wang; Sage Doshay; Kofi Edee; Jianji Yang; Jonathan A. Fan

doi:10.1038/s41377-019-0159-5

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High-efficiency, large-area, topology-optimized metasurfaces

Article

- High-efficiency, large-area, topology-optimized metasurfaces
- High-efficiency, large-area, topology-optimized metasurfaces
- LSA 2019年8卷第3期页码：420-428
- Affiliations：
  
  1.Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
  2.Department of Applied Physics, Stanford University, Stanford, CA 94305, USA
  3.Université Clermont Auvergne, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France
  4.CNRS, UMR 6602, Institut Pascal, F-63177 Aubière, France
- Author bio：
  
  Jonathan A. Fan (jonfan@stanford.edu)
- Funds：
- DOI：10.1038/s41377-019-0159-5
  中图分类号：
- 纸质出版日期：2019，
  
  网络出版日期：2019-05-29，
  
  收稿日期：2018-12-09，
  
  修回日期：2019-04-30，
  
  录用日期：2019-05-05
- Accepted：
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High-efficiency, large-area, topology-optimized metasurfaces[J]. LSA, 2019,8(3):420-428.

Phan, T. et al. High-efficiency, large-area, topology-optimized metasurfaces. Light: Science & Applications, 8, 420-428 (2019).
High-efficiency, large-area, topology-optimized metasurfaces[J]. LSA, 2019,8(3):420-428. DOI： 10.1038/s41377-019-0159-5.

Phan, T. et al. High-efficiency, large-area, topology-optimized metasurfaces. Light: Science & Applications, 8, 420-428 (2019). DOI： 10.1038/s41377-019-0159-5.

摘要

Abstract

Metasurfaces are ultrathin optical elements that are highly promising for constructing lightweight and compact optical systems. For their practical implementation

it is imperative to maximize the metasurface efficiency. Topology optimization provides a pathway for pushing the limits of metasurface efficiency; however

topology optimization methods have been limited to the design of microscale devices due to the extensive computational resources that are required. We introduce a new strategy for optimizing large-area metasurfaces in a computationally efficient manner. By stitching together individually optimized sections of the metasurface

we can reduce the computational complexity of the optimization from high-polynomial to linear. As a proof of concept

we design and experimentally demonstrate large-area

high-numerical-aperture silicon metasurface lenses with focusing efficiencies exceeding 90%. These concepts can be generalized to the design of multifunctional

broadband diffractive optical devices and will enable the implementation of large-area

high-performance metasurfaces in practical optical systems.

关键词

Keywords

references

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