Chinese Optics Letters, Volume. 23, Issue 10, (2025)

Spin-Orbit Coupling in Spatiotemporal Optical Vortex Arrays Generated by 4Pi Coherent Focusing [Early Posting]

Zhang Zhaorui, Jin Yang, Zhang Ruohu, Li Zhigang, Li Bingjue, Rui Guanghao
Author Affiliations
  • China
  • Southeast University
  • show less

    Spatiotemporal optical vortices (STOVs) are distinguished by their intricate phase structures and orbital angular momentum properties. This study demonstrates a coherent 4Pi-focused method generating STOV arrays by tightly focusing wavepackets carrying spatiotemporal vortice and an additional spatial vortex. Numerical simulations reveal that the structural characteristics of the STOV array are governed by interplay between the spatiotemporal and spatial topological charges of the incident wavepacket. Notably, the introduction of spin angular momentum into the wavepacket induces spin-orbit coupling, resulting in a distinctive tilt of the STOV array. These findings open potential pathways for high-dimensional optical manipulation and advanced optical information multiplexing.

    Paper Information

    Manuscript Accepted: Jul. 8, 2025

    Posted: Jul. 16, 2025

    DOI: 10.3788/COL202523.100008