Directional terahertz holography with thermally active Janus metasurface

Benwen Chen; Shengxin Yang; Jian Chen; Jingbo Wu; Ke Chen; Weili Li; Yihui Tan; Zhaosong Wang; Hongsong Qiu; Kebin Fan; Caihong Zhang; Huabing Wang; Yijun Feng; Yunbin He; Biaobing Jin; Xinglong Wu; Jian Chen; Peiheng Wu

doi:10.1038/s41377-023-01177-4

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Directional terahertz holography with thermally active Janus metasurface

Original Articles

- Directional terahertz holography with thermally active Janus metasurface
- Light: Science & Applications Vol. 12, Issue 6, Pages: 1162-1171(2023)
- Affiliations：
  
  1.Research Institute of Superconductor Electronics (RISE), School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
  2.Purple Mountain Laboratories, Nanjing 211111, China
  3.Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
  4.School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
  5.National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
- Author bio：
  
  Jingbo Wu (jbwu@nju.edu.cn)
  Ke Chen (ke.chen@nju.edu.cn)
  Yunbin He (ybhe@hubu.edu.cn)
  Biaobing Jin (bbjin@nju.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01177-4
  CLC：
- Published：30 June 2023，
  
  Published Online：5 June 2023，
  
  Received：15 November 2022，
  
  Revised：19 April 2023，
  
  Accepted：6 May 2023
Scan for full text
Chen, B. W. et al. Directional terahertz holography with thermally active Janus metasurface. Light: Science & Applications, 12, 1162-1171 (2023).
DOI：

Chen, B. W. et al. Directional terahertz holography with thermally active Janus metasurface. Light: Science & Applications, 12, 1162-1171 (2023). DOI： 10.1038/s41377-023-01177-4.

摘要

Abstract

Dynamic manipulation of electromagnetic (EM) waves with multiple degrees of freedom plays an essential role in enhancing information processing. Currently

an enormous challenge is to realize directional terahertz (THz) holography. Recently

it was demonstrated that Janus metasurfaces could produce distinct responses to EM waves from two opposite incident directions

making multiplexed dynamic manipulation of THz waves possible. Herein

we show that thermally activated THz Janus metasurfaces integrating with phase change materials on the meta-atoms can produce asymmetric transmission with the designed phase delays. Such reconfigurable Janus metasurfaces can achieve asymmetric focusing of THz wave and directional THz holography with free-space image projections

and particularly the information can be manipulated via temperature and incident THz wave direction. This work not only offers a common strategy for realizing the reconfigurability of Janus metasurfaces

but also shows possible applications in THz optical information encryption

data storage

and smart windows.

关键词

Keywords

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