Creating Longitudinally Varying Vector Vortex Beams with an All‐Dielectric Metasurface. Issue 10 (1st July 2022)

• Record Type: Journal Article
• Authors: Zheng, Chenglong; Li, Jie; Liu, Jingyu; Li, Jitao; Yue, Zhen; Li, Hui; Yang, Fan; Zhang, Yating; Zhang, Yan; Yao, Jianquan
• Is Part Of: Laser & photonics reviews. Volume 16:Issue 10(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-01
• Subjects: metasurfaces -- vectors -- vortex beams; Lasers -- Periodicals; Photonics -- Periodicals; Lasers -- Périodiques; Photonique -- Périodiques; 621.36
• DOI: 10.1002/lpor.202200236
• Languages: English
• ISSNs: 1863-8880

Abstract

Abstract: Vector vortex beams have attracted considerable research attention owing to their unique optical properties, and have been explored in vortex filtering, photon entanglement, and the photonic spin hall effect. In this work, a universal all‐dielectric metasurface platform is proposed that can generate longitudinally varying vector vortex beams in the terahertz band. As a proof‐of‐concept demonstration, a series of metasurface examples generating evolution of topological charges and vector polarization states of generated vector vortex beams are characterized. The experimental results agree well with the simulations, fully verifying the feasibility of the proposed scheme. The proposed metasurface strategy may find applications ranging from optical traps to polarization optics. Abstract : A universal all‐dielectric metasurface platform that can generate longitudinally varying vector vortex beams in terahertz band is proposed. Specifically, the topological charges and polarization states of the generated vortex beams evolve with the propagation distance. The proposed metasurface strategy has great application potentials in polarization optics, polarization‐switchable devices, and light‐matter interaction.