Optical telescope with Cassegrain metasurfaces

Nanophotonics

article

Xuan Liu¹  Guixin Li¹  Junhong Deng¹  King Fai Li¹  Mingke Jin¹  Yutao Tang¹  Xuecai Zhang¹  Xing Cheng¹  Hong Wang¹  Wei Liu³ 

[1] Department of Materials Science and Engineering, Southern University of Science and Technology;Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices, Southern University of Science and Technology;College for Advanced Interdisciplinary Studies, National University of Defense Technology

关键词: metasurface;    nanofabrication;    metamaterials;   

DOI  :  10.1515/nanoph-2020-0012

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The Cassegrain telescope, made of a concave primary mirror and a convex secondary mirror, is widely utilized for modern astronomical observation. However, the existence of curved mirrors inevitably results in bulky configurations. Here, we propose a new design of the miniaturized Cassegrain telescope by replacing the curved mirrors with planar reflective metasurfaces. The focusing and imaging properties of the Cassegrain metasurface telescopes are experimentally verified for circularly polarized incident light at near infrared wavelengths. The concept of the metasurface telescopes can be employed for applications in telescopes working at infrared, Terahertz, and microwave and even radio frequencies.

【 授权许可】

CC BY