Optical vortex generator with linearly polarized light illumination

Qi Zhang; Peiyu Li; Yanying Li; Han Wang; Lixia Liu; Liren Zhang; Shuyun Teng

doi:10.1117/1.JNP.12.016011

13 February 2018 Optical vortex generator with linearly polarized light illumination

Qi Zhang, Peiyu Li, Yanying Li, Han Wang, Lixia Liu, Liren Zhang, Shuyun Teng

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 1, 016011 (February 2018). https://doi.org/10.1117/1.JNP.12.016011

Abstract

A device is designed for generating the near-field optical vortex (NFOV) using linearly polarized light illumination. This optical vortex generator consists of 18 homogeneous rectangular holes. Each rectangular hole can be modeled as a pair of orthogonal dipoles with π/2 and −π/2 phase differences under 45 deg and −45 deg polarized light illuminations, respectively. The superposition of the surface plasmon polaritons excited by these 18 homogeneous rectangular holes can create an optical vortex at the center of the generator, and the topological charge of the optical vortex can be changed by arranging these rectangular holes in a different trajectory. Both theoretical analysis and numerical simulation are used to investigate the properties of the NFOV generator. The numerical results demonstrate that the NFOV generated by the device is reliable, efficient, and flexible. This NFOV generator can be applied in optical manipulation.

Citation Download Citation

Qi Zhang, Peiyu Li, Yanying Li, Han Wang, Lixia Liu, Liren Zhang, and Shuyun Teng "Optical vortex generator with linearly polarized light illumination," Journal of Nanophotonics 12(1), 016011 (13 February 2018). https://doi.org/10.1117/1.JNP.12.016011

Received: 16 August 2017; Accepted: 15 January 2018; Published: 13 February 2018

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