Functional metasurface quarter-wave plates for simultaneous polarization conversion and beam steering

Yadong Deng, Cuo Wu, Chao Meng, Sergey I. Bozhevolnyi*, Fei Ding

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The capability to manipulate the polarization state of light at the nanoscale is of paramount importance in many emerging research areas ranging from optical communication to quantum information processing. Gap-surface plasmon (GSP) metasurfaces, which provide advantages and abilities of molding reflected fields, have been demonstrated excellently suited for integration of multifunctional polarization optics into a single device. Here, we establish a versatile GSP metasurface platform based on nanoscale quarter-wave plates (nano-QWPs) that enable efficient circular-to-linear polarization conversion along with the complete phase control over reflected fields. Capitalizing on the nano-QWP design, we demonstrate, both theoretically and experimentally, how resonance and geometric phases can be used in concert to achieve independent and simultaneous phase modulation of both co- A nd cross-polarized circularly polarized (CP) waves by realizing arbitrary beam steering of co- A nd cross-polarized CP channels in a broadband near-infrared range. The GSP metasurface platform established in our work provides versatile and flexible solutions to enrich multiple functionalities for diversified metasurface-based polarization optics exploited in modern integrated photonic devices and systems.

Original languageEnglish
JournalACS Nano
Volume15
Issue number11
Pages (from-to)18532–18540
ISSN1936-0851
DOIs
Publication statusPublished - 23. Nov 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

Keywords

  • beam steering
  • gap-surface plasmon metasurface
  • geometric phase
  • polarization conversion
  • quarter-wave plates
  • resonance phase

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