Spatial separation of azimuthally and radially polarized beams via patterned liquid-crystal alignment induced by sparse polymer ribbons

Mingce Chen; Hengkang Zhang; Sichang Yan; Li Wang; Loulou Deng; Lin Li; Zihan Wang

doi:10.1117/12.3004162

24 November 2023 Spatial separation of azimuthally and radially polarized beams via patterned liquid-crystal alignment induced by sparse polymer ribbons

Mingce Chen, Hengkang Zhang, Sichang Yan, Li Wang, Loulou Deng, Lin Li, Zihan Wang

Author Affiliations +

Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 129350S (2023) https://doi.org/10.1117/12.3004162
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China

Abstract

With the principle of electrically controlled birefringence (ECB), we propose a new method to spatially separate the azimuthally and radially polarized beams. The method is premised on a regularized arrangement of liquid-crystal (LC) induced by sparse polymer ribbons.The ECB effect was achieved by a hole-patterned LC device with an initial radial alignment, which is induced by polymer ribbons pre-fabricated on the substrate. The polymer ribbons were formed on the substrate via the ultraviolet (UV) mask exposure method, which has the advantages of low cost, simple fabrication process and can be used for mass production. When the voltage signals are applied to the fabricated LC device, a gradient refractive index distribution will form inside the device. Restricted by the inherent polarization-sensitive properties of the nematic phase, it corresponds to the extraordinary optical component, which is exactly the radially polarized beam. According to the above principle, the extraordinary and ordinary polarized components can be separated. Experiments demonstrated that the spatial separation was effectively achieved by the proposed LC device. The proposed method has provided an approach for the light field manipulation based on patterned liquid crystal alignment.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mingce Chen, Hengkang Zhang, Sichang Yan, Li Wang, Loulou Deng, Lin Li, and Zihan Wang "Spatial separation of azimuthally and radially polarized beams via patterned liquid-crystal alignment induced by sparse polymer ribbons", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 129350S (24 November 2023); https://doi.org/10.1117/12.3004162

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