Terahertz Reconfigurable Metasurface for Dynamic Non-Diffractive Orbital Angular Momentum Beams using Vanadium Dioxide

Ling Wang, Yang Yang, Shufang Li* (Corresponding Author), Li Deng* (Corresponding Author), Weijun Hong, Chen Zhang, Jianfeng Zhu, David McGloin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Orbital angular momentum (OAM) generation based on metasurfaces has attracted tremendous interest due to its potential in capacity enhancement of high-speed wireless communication systems. Reconfigurability is one of the key desired characteristics for the design of future metasurfaces. In this paper, a metasurface taking advantage of vanadium dioxide (VO2) is proposed. The proposed design can generate a non-diffractive OAM beam and achieve the multiple reconfigurability of the topological charge, beam radius, beam deflection angle. The operation frequency can be adjusted by controlling the state of VO2 at terahertz (THz) region. Simulation results demonstrate that the designed metasurface can generate a non-diffractive OAM beam with tunable topological charge and beam radius, propagating along ±x or ±y directions with the controllable deflection angle between 6.74° and 44.77°, ranging from 0.69 THz to 0.79 THz.

Original languageEnglish
Article number4600712
Number of pages13
JournalIEEE Photonics Journal
Volume12
Issue number3
Early online date9 Jun 2020
DOIs
Publication statusPublished - 19 Jun 2020

Keywords

  • Permittivity
  • Conductivity
  • Orbits
  • Vanadium
  • Wireless communication
  • Microwave communication

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