Color coded metadevices toward programmed terahertz switching

Weibao He; Xiang'ai Cheng; Siyang Hu; Ziheng Ren; Zhongyi Yu; Shun Wan; Yuze Hu; Tian Jiang

doi:10.1038/s41377-024-01495-1

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Color coded metadevices toward programmed terahertz switching

Original Articles

- Color coded metadevices toward programmed terahertz switching
- Color coded metadevices toward programmed terahertz switching
- LSA 2024年13卷第7期页码：1383-1392
- Affiliations：
  
  1.College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
  2.Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
  3.Hunan Provincial Key Laboratory of High Energy Laser Technology, National University of Defense Technology, Changsha, China
  4.Institute for Quantum Science and Technology, College of Science, National University of Defense Technology, Changsha, China
- Author bio：
  
  Yuze Hu (hyz_yj@sina.com)
  Tian Jiang (tjiang@nudt.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01495-1
  中图分类号：
- 收稿日期：2023-11-21，
  
  修回日期：2024-05-01，
  
  录用日期：2024-05-26，
  
  网络出版日期：2024-06-25，
  
  纸质出版日期：2024-07-31
- Accepted：
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Color coded metadevices toward programmed terahertz switching[J]. LSA, 2024,13(7):1383-1392.

He, W. B. et al. Color coded metadevices toward programmed terahertz switching.,Light: Science & Applications, 13, 1383-1392 (2024).
Color coded metadevices toward programmed terahertz switching[J]. LSA, 2024,13(7):1383-1392. DOI： 10.1038/s41377-024-01495-1.

He, W. B. et al. Color coded metadevices toward programmed terahertz switching.,Light: Science & Applications, 13, 1383-1392 (2024). DOI： 10.1038/s41377-024-01495-1.

摘要

Abstract

Terahertz modulators play a critical role in high-speed wireless communication

non-destructive imaging

and so on

which have attracted a large amount of research interest. Nevertheless

all-optical terahertz modulation

an ultrafast dynamical control approach

remains to be limited in terms of encoding and multifunction. Here we experimentally demonstrated an optical-programmed terahertz switching realized by combining optical metasurfaces with the terahertz metasurface

resulting in 2-bit dual-channel terahertz encoding. The terahertz metasurface

made up of semiconductor islands and artificial microstructures

enables effective all-optical programming by providing multiple frequency channels with ultrafast modulation at the nanosecond level. Meanwhile

optical metasurfaces covered in terahertz metasurface alter the spatial light field distribution to obtain color code. According to the time-domain coupled mode theory analysis

the energy dissipation modes in terahertz metasurface can be independently controlled by color excitation

which explains the principle of 2-bit encoding well. This work establishes a platform for all-optical programmed terahertz metadevices and may further advance the application of composite metasurface in terahertz manipulation.

关键词

Keywords

references

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