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.
This work was supported in part by the Natural Science Foundation of Beijing under Grant 4202047, in part by the Beijing Nova Program under Grant 181100006218039, and in part by the 111 Project (B17007).
10.13039/501100004826-Natural Science Foundation of Beijing Municipality (Grant Number: 4202047)
10.13039/501100005090-Beijing Nova Program (Grant Number: Z181100006218039)
10.13039/501100013314-Higher Education Discipline Innovation Project (Grant Number: B17007)
- Wireless communication
- Microwave communication