Broadband multifunctional metasurfaces enabling polarization multiplexed focused vortex array generation

Yousaf Murtaza Rind, Nasir Mahmood, Isma Javed, Lei Gao, Tauseef Tauqeer, Humberto Cabrera, Muhammad Zubair*, Yehia Massoud, Muhammad Qasim Mehmood

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Metasurfaces are ultrathin artificially engineered structures exquisitely designed to tailor the wavefront, polarization, and amplitude of incident light, offering a versatile platform for implementing compact and integrated photonics devices. Metasurface-based structured light generation has gained considerable attention in the scientific community for its various exotic applications, including optical communication, particle manipulation, and high-resolution lithography. State-of-the-art design techniques include polarization multiplexing, multiple vortices beam generation, and vortex arrays. However, there needs to be more techniques for generating polarization switchable vortex arrays, despite the apparent advantages in significant application fields, necessitating a simple design technique. Here, we present a straightforward design technique utilizing computer-generated holography (CGH) and photonic spin Hall effect (PHSE) to realize a metadevice platform capable of generating broadband multiple optical vortex arrays with switchable polarization output. Our approach involves designing phase masks for the vortex arrays using CGH, which are then encoded onto the metasurface. By leveraging PSHE, the designed metasurfaces produce the desired optical response depending on the input polarization state. Using the proposed design technique as proof of concept, different all-dielectric metasurfaces capable of generating optical vortex arrays of different dimensions are demonstrated. The results verify the effectiveness of the proposed methodology. The design has potential applications in data communications, storage, quantum computation, nanoscale physical manipulation, and microscopy.

Original languageEnglish (US)
Article number107648
JournalMaterials Today Communications
Volume38
DOIs
StatePublished - Mar 2024

Bibliographical note

Publisher Copyright:
© 2023

Keywords

  • Optical vortices
  • Photonic spin Hall effect (PSHE)
  • Spin decoupling
  • Spin-orbital interactions
  • Vortex arrays

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Materials Chemistry

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