Design for quality: reconfigurable flat optics based on active metasurfaces

Nanophotonics

article

Mikhail Y. Shalaginov¹  Bowen Zheng²  Clayton Fowler²  Hualiang Zhang²  Douglas H. Werner³  Juejun Hu¹  Tian Gu⁴  Sawyer D. Campbell³  Sensong An²  Yifei Zhang¹  Carlos Ríos¹  Eric B. Whiting³  Yuhao Wu³  Lei Kang³ 

[1] Department of Materials Science & Engineering, Massachusetts Institute of Technology;Department of Electrical & Computer Engineering, University of Massachusetts Lowell;Department of Electrical Engineering, Pennsylvania State University, University Park;Materials Research Laboratory, Massachusetts Institute of Technology

关键词: deep neural network;    inverse design;    metasurface;    meta-optics;    phase-change material;    reconfigurable;   

DOI  :  10.1515/nanoph-2020-0033

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Optical metasurfaces, planar subwavelength nanoantenna arrays with the singular ability to sculpt wavefront in almost arbitrary manners, are poised to become a powerful tool enabling compact and high-performance optics with novel functionalities. A particularly intriguing research direction within this field is active metasurfaces, whose optical response can be dynamically tuned postfabrication, thus allowing a plurality of applications unattainable with traditional bulk optics. Designing reconfigurable optics based on active metasurfaces is, however, presented with a unique challenge, since the optical quality of the devices must be optimized at multiple optical states. In this article, we provide a critical review on the active meta-optics design principles and algorithms that are applied across structural hierarchies ranging from single meta-atoms to full meta-optical devices. The discussed approaches are illustrated by specific examples of reconfigurable metasurfaces based on optical phase-change materials.

【 授权许可】

CC BY