Arbitrary manipulations of dual harmonics and their wave behaviors based on space-time-coding digital metasurface

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

4 Scopus Citations
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Author(s)

  • Jun Yan Dai
  • Jin Yang
  • Wankai Tang
  • Ming Zheng Chen
  • Jun Chen Ke
  • And 3 others
  • Qiang Cheng
  • Shi Jin
  • Tie Jun Cui

Detail(s)

Original languageEnglish
Article number041408
Journal / PublicationApplied Physics Reviews
Volume7
Issue number4
Online published4 Dec 2020
Publication statusPublished - Dec 2020

Abstract

Metasurfaces have developed rapidly in the past decade because their customizable properties are able to regulate wave-matter interaction over a subwavelength scale. Recently, the space-time modulated metasurfaces have attracted significant attention for the additional degree of freedom they offer in the manipulation of the electromagnetic waves in both space and time domains. However, the existing techniques have limited wave control capabilities, which results in just a few feasible schemes, like regulation of only one specific harmonic. Here, we propose to create independent manipulations of arbitrary dual harmonics and their wave behaviors using a space-time-coding digital metasurface. By employing different space-time-coding sequences in the reflection phase of the metasurface, independent phase-pattern configurations of two desired harmonics can be achieved simultaneously, which further leads to independent beam shaping at the two harmonic frequencies. We have developed an analytical theory to offer physical insights into the arbitrary dual-harmonic manipulations of spectra and spatial beams, which is verified by experiments with good agreements. The presented space-time-coding strategy provides a new way to design multifunctional programable systems, which will find potential applications such as cognitive radar and multi-user wireless communications.

Citation Format(s)

Arbitrary manipulations of dual harmonics and their wave behaviors based on space-time-coding digital metasurface. / Dai, Jun Yan; Yang, Jin; Tang, Wankai; Chen, Ming Zheng; Ke, Jun Chen; Cheng, Qiang; Jin, Shi; Cui, Tie Jun.

In: Applied Physics Reviews, Vol. 7, No. 4, 041408, 12.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review