Dual-functional coding metasurfaces made of anisotropic all-dielectric resonators

Linda Shao, Malin Premaratne, Weiren Zhu

Research output: Contribution to journalArticleResearchpeer-review

40 Citations (Scopus)

Abstract

Digital coding metasurfaces, composed of only two types of unit cells with opposite phase responses (0 and π) that can map to the usual binary elements '0' and '1', are capable of generating coded pulsed sequences of electromagnetic waves. In this paper, we present a generic extensible strategy for designing dual-functional anisotropic coding metasurfaces based on all-dielectric resonators. The polarization-dependent beam manipulations are achieved via encoding the metasurfaces with different coding sequences in the two orthogonal polarizations of the electromagnetic wave propagating through the surface. As proof of concept, we show it is possible to achieve line focusing and point focusing in a single coding metasurface when illuminated by the x-or y-polarized electromagnetic waves. We also present anisotropic coding metasurfaces for realizing multi-beam generation and polarization-selected mirror/diffuse reflection. The near-field distributions and far-field scattering patterns extracted from full-wave simulations are presented to show the multiple functions of the metasurfaces and good conformance with theoretical predictions.

Original languageEnglish
Article number8680008
Pages (from-to)45716-45722
Number of pages7
JournalIEEE Access
Volume7
DOIs
Publication statusPublished - 2019

Keywords

  • All-dielectric
  • anisotropic
  • coding metasurface
  • electromagnetic wave manipulation

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