s偏振主导衍射的巯基HPDLC光栅。

IF 3.3 2区 物理与天体物理 Q2 OPTICS
Optics letters Pub Date : 2025-10-01 DOI:10.1364/OL.573249
Wenbo Mu, Feirong Liu, Run Tian, Penglei Li, Yulan Fu, Yiwei Zhang, Jinxin Guo, Xinping Zhang
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引用次数: 0

摘要

聚合物分散液晶(HPDLC)全息光栅由于其独特的光学特性和可调性而具有优异的光电性能。然而,先前报道的HPDLC光栅在其衍射中以p偏振响应为主,即p偏振下的HPDLC光栅的衍射效率远大于s偏振。本文报道了一种基于巯基单体的HPDLC光栅,它具有较高的s偏振衍射效率,而不是p偏振衍射效率。实验研究了折射率调制(Δn)与记录强度和液晶(LC)掺杂浓度的关系。结果表明,在最佳记录条件下,Δn在s偏振态和p偏振态分别可达到1.93 × 10-2和1.21 × 10-2。结合形貌测试,结果表明Δn强烈依赖于光栅中富lc相和富聚合物相的比例。此外,我们证实了较低的记录强度导致全息记录形成的LC液滴尺寸较大,从而导致HPDLC光栅的阈值驱动电压降低。我们相信在所提出的巯基光聚合物中s偏振主导衍射的发现为HPDLC光栅的设计提供了一个新的方向。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A thiol-ene-based HPDLC grating with s-polarizationdominated diffraction.

Holographic Polymer-Dispersed Liquid Crystal (HPDLC) gratings exhibit excellent electro-optical performances due to their unique optical characteristics and tunability. However, the previously reported HPDLC gratings where thep-polarization response dominates in their diffraction, i.e., the diffraction efficiency of HPDLC gratings in p-polarization is much larger than that in s-polarization. This Letter reports a thiol-ene monomer-based HPDLC grating, which exhibits a high s-polarization diffraction efficiency rather than p-polarization. The dependence of refractive index modulation (Δn) on recording intensity and liquid crystal (LC) doping concentration is experimentally investigated. The results show that Δn is able to reach as high as 1.93 × 10-2 in s-polarization and 1.21 × 10-2 in p-polarization with an optimum recording condition. Combining with the morphology examinations, the results imply that the Δn strongly depends on the ratio of LC-rich and polymer-rich phases in the grating. Moreover, we confirm that a lower recording intensity leads to a larger LC droplet size formed by holographic recording and thereby results in a decrease in threshold driving voltage of HPDLC gratings. We believe that the finding of s-polarization-dominated diffraction in the proposed thiol-ene photopolymer provides a new direction for HPDLC grating design.

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来源期刊
Optics letters
Optics letters 物理-光学
CiteScore
6.60
自引率
8.30%
发文量
2275
审稿时长
1.7 months
期刊介绍: The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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