具有可调谐拓扑电荷和极化的贝塞尔光束的产生

IF 6.6 2区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Tong Nan, Zhiyan Zhu, Guocui Wang, Yunfei Wang, Shulin Sun, Hao Tian, Yan Zhang
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引用次数: 0

摘要

贝塞尔光束由于其自愈和无衍射的特性,在光通信、粒子操纵和医学方面具有重要的潜力。然而,大多数现有的贝塞尔光束产生装置要么是静态的,要么只能动态调整一个特性。在本文中,我们提出了一种基于moirir元器件的可调谐贝塞尔光束产生方案。该装置由两个级联的全介电超表面层组成。通过调整两层之间的相对旋转,可以产生具有不同拓扑电荷的贝塞尔光束。此外,级联超表面的整体旋转通过利用传播相位和几何相位来调制贝塞尔光束的偏振态。实验结果证实产生了具有可调谐均匀线性极化和拓扑电荷的贝塞尔光束,以及具有可调谐拓扑电荷和沿传播方向偏振变化可控的贝塞尔光束。该方法为贝塞尔光束的横向和纵向光场特性的连续动态控制提供了一种灵活的设计策略。此外,它还可能推动相关领域的发展,包括光通信、粒子操纵和超分辨率成像。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Generation of Bessel beams with tunable topological charge and polarization
Bessel beams hold significant potential in optical communications, particle manipulation, and medicine due to their self-healing and nondiffracting properties. However, most existing Bessel beam generation devices are either static or capable of dynamically adjusting only a single characteristic. In this paper, we propose a tunable Bessel beam generation scheme based on a moiré meta-device. The device consists of two cascaded layers of all-dielectric metasurfaces. By adjusting the relative rotation between two layers, Bessel beams with varying topological charges can be generated. Moreover, the overall rotation of the cascaded metasurfaces modulates the polarization state of the Bessel beam by leveraging both the propagation phase and geometric phase. Experimental results confirmed the generation of Bessel beams with tunable uniform linear polarization and topological charge, as well as Bessel beams with tunable topological charge and controllable polarization variations along the propagation direction. This method offers a flexible design strategy for the continuous dynamic manipulation of both the transverse and longitudinal optical field properties of Bessel beams. In addition, it may also advance the development of related fields, including optical communications, particle manipulation, and super-resolution imaging.
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来源期刊
Nanophotonics
Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
13.50
自引率
6.70%
发文量
358
审稿时长
7 weeks
期刊介绍: Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.
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