Nonreciprocal metasurface with space-time phase modulation

Xuexue Guo; Yimin Ding; Yao Duan; Xingjie Ni

doi:10.1038/s41377-019-0225-z

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Nonreciprocal metasurface with space-time phase modulation

Article

- Nonreciprocal metasurface with space-time phase modulation
- Nonreciprocal metasurface with space-time phase modulation
- LSA 2019年8卷第6期页码：1181-1189
- Affiliations：
  
  Department of Electrical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Author bio：
  
  Xingjie Ni (xingjie@psu.edu)
- Funds：
- DOI：10.1038/s41377-019-0225-z
  中图分类号：
- 纸质出版日期：2019，
  
  网络出版日期：2019-12-18，
  
  收稿日期：2019-07-24，
  
  修回日期：2019-10-31，
  
  录用日期：2019-11-18
- Accepted：
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Nonreciprocal metasurface with space-time phase modulation[J]. LSA, 2019,8(6):1181-1189.

Guo, X. et al. Nonreciprocal metasurface with space-time phase modulation. Light: Science & Applications, 8, 1181-1189 (2019).
Nonreciprocal metasurface with space-time phase modulation[J]. LSA, 2019,8(6):1181-1189. DOI： 10.1038/s41377-019-0225-z.

Guo, X. et al. Nonreciprocal metasurface with space-time phase modulation. Light: Science & Applications, 8, 1181-1189 (2019). DOI： 10.1038/s41377-019-0225-z.

摘要

Abstract

Creating materials with time-variant properties is critical for breaking reciprocity that imposes fundamental limitations on wave propagation. However

it is challenging to realize efficient and ultrafast temporal modulation in a photonic system. Here

leveraging both spatial and temporal phase manipulation offered by an ultrathin nonlinear metasurface

we experimentally demonstrated nonreciprocal light reflection at wavelengths around 860 nm. The metasurface

with travelling-wave modulation upon nonlinear Kerr building blocks

creates spatial phase gradient and multi-terahertz temporal phase wobbling

which leads to unidirectional photonic transitions in both the momentum and energy spaces. We observed completely asymmetric reflections in forward and backward light propagations over a large bandwidth around 5.77 THz within a sub-wavelength interaction length of 150 nm. Our approach highlights a potential means for creating miniaturized and integratable nonreciprocal optical components.

关键词

Keywords

references

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