Generation of a plasmonic radially polarized vector beam with linearly polarized illumination

• DOI: 10.1364/ol.43.004208
• Publication Date: 2018-08-22T20:34:13Z
• Authors: Yu-Qin Zhang; Xiang-Yu Zeng; Rui-Rui Zhang; Zi-Jun Zhan; Xing Li; Li Ma; Chun-Xiang Liu; Chang-Wei He; Chuan-Fu Cheng
• Keywords: 02 engineering and technology; 0210 nano-technology

Polarization state of a wave field can be manipulated through the plasmonic metasurface consisting of orthogonal nanoslit pairs; the output polarization angle is independent of the incident linearly polarized light and is highly dependent on the orientations of nanoslit pairs. We combine the Archimedes spiral with the nanoslit pairs to compensate for the Pancharatnam-Berry (PB) phase induced by the orientation of nanoslits, as well as achieve the radially polarized vector beam (RPVB) under the illuminations of different linearly polarized lights. Experiments are performed to successfully realize the RPVB, and the results are in excellent agreement with the numerical simulations.