Laser & Optoelectronics Progress, Volume. 62, Issue 15, 1526001(2025)

Hybrid Phase Concentric Generalized Perfect Vortex Metasurface (Invited)

Gaodi Chen and Xiaoxu Deng*
Author Affiliations
  • School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • show less

    Due to the spatial constraint of arrayed vortex beams, the number of practically applicable orbital angular momentum (OAM) eigenstates remains finite. To address this limitation, this paper incorporates the generalized focusing phase and circular domain function into the vortex phase design, fabricating a vortex phase metasurface based on α-Si nanoantennas. The experimental results demonstrate the successful generation of concentric generalized perfect vortex beams (G-PVBs). This novel design transcends the constraint of conventional vortex beam symmetry, featuring distinct vortex shapes and spiral lobes in the beam pattern, with spiral interference patterns arranged concentrically without overlap. The approach effectively decouples the shape, topological charge, number of vortex beams, and polarization characteristics. Each vortex beam maintains stable topological charge and shape information, successfully preventing intermodal crosstalk. Through this efficient concentric configuration, this research achieves spatial multiplexing, polarization multiplexing, and OAM mode multiplexing of perfect vortex beams. This advancement expands the communication channels and information dimensions in vortex beam communications, offering significant potential for high-capacity encrypted vortex beam communication systems.

    Keywords
    Tools

    Get Citation

    Copy Citation Text

    Gaodi Chen, Xiaoxu Deng. Hybrid Phase Concentric Generalized Perfect Vortex Metasurface (Invited)[J]. Laser & Optoelectronics Progress, 2025, 62(15): 1526001

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Physical Optics

    Received: Apr. 21, 2025

    Accepted: Jun. 3, 2025

    Published Online: Jul. 2, 2025

    The Author Email: Xiaoxu Deng (xxdeng@sjtu.edu.cn)

    DOI:10.3788/LOP251054

    CSTR:32186.14.LOP251054

    Topics