Zeng Xiang-Yu, Zhang Yu-Qin, Zhang Rui-Rui, Ren Xiao-Rong, Zhan Zi-Jun, Gu Man-Na, Sun Rui, Liu Chun-Xiang, Cheng Chuan-Fu
Opt Lett. 2021 Feb 1;46(3):528-531. doi: 10.1364/OL.415981.
Metasurfaces with orthogonal nano-slit pairs arranged on spirals are proposed to generate vector beams (VBs) of Bell-like states and slanted polarizations. The design of the metasurfaces is based on the theoretically derived parameter condition for manipulation of the two vector vortex modes, which is satisfied by matching the three parameters of rotation order , the spiral order , and incident polarization helicity . The linear polarization states of the VBs are controlled by the initial orientation angle of slit pairs. VBs of satisfying quality are experimentally obtained, with the analytical and simulated results validated.
提出了一种在螺旋线上排列正交纳米狭缝对的超表面，以产生类贝尔态和倾斜偏振的矢量光束（VBs）。超表面的设计基于理论推导的用于操纵两种矢量涡旋模式的参数条件，通过匹配旋转阶数、螺旋阶数和入射偏振螺旋度这三个参数来满足该条件。VBs的线性偏振态由狭缝对的初始取向角控制。通过实验获得了质量令人满意的VBs，并验证了分析和模拟结果。
