Active Quasi-BIC Enabled Optical Vortex Generation

Electromagnetic beams that carry orbital angular momentum (OAM) have enormous potential in various applications. By exploiting the winding topology of quasi-BIC modes around the polarization singularity in k-space, a novel optical vortex (OV) generation method has been recently proposed. Compared with the conventional approaches, this method can lead to robust OV generators which are feasible and easy to fabricate. Here, by leveraging the nonlinear dynamics of silicon, we demonstrate a silicon-based quasi-BIC platform supporting optically switchable OV generation. A Huygens sources-based model extends the near-field (NF) spatial modal analysis to the far-field (FF) region. Meanwhile, the OV switching effects in the picosecond scale are studied using nonlinear modeling at near-infrared wavelengths. The demonstrated nontrivial topological nature can expand the applications of BIC-based devices in many areas including high-capacity optical communication and mode-division multiplexing.

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Work Title Active Quasi-BIC Enabled Optical Vortex Generation
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Open Access
Creators
  1. Yuhao Wu
  2. Lei Kang
  3. Sawyer D. Campbell
  4. Pingjuan Li Werner
  5. Douglas Henry Werner
Keyword
  1. Quasi-BIC
  2. Optical Vortices
  3. Topological Photonics
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. 2023 International Applied Computational Electromagnetics Society Symposium (ACES)
Publication Date May 9, 2023
Publisher Identifier (DOI)
  1. https://doi.org/10.23919/ACES57841.2023.10114756
Deposited September 09, 2024

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Version 1
published

  • Created
  • Added Active_Quasi-BIC_Enabled_Optical_Vortex_Generation.pdf
  • Added Creator Yuhao Wu
  • Added Creator Lei Kang
  • Added Creator Sawyer D. Campbell
  • Added Creator Pingjuan Li Werner
  • Added Creator Douglas Henry Werner
  • Published
  • Updated
  • Updated Keyword, Publication Date Show Changes
    Keyword
    • Quasi-BIC, Optical Vortices, Topological Photonics
    Publication Date
    • 2023-01-01
    • 2023-05-09