Visible-Frequency Metasurface for Structuring and Spatially Multiplexing Optical Vortices

M Q Mehmood; Shengtao Mei; Sajid Hussain; Kun Huang; S Y Siew; Lei Zhang; Tianhang Zhang; Xiaohui Ling; Hong Liu; Jinghua Teng; Aaron Danner; Shuang Zhang; Cheng-Wei Qiu

doi:10.1002/adma.201504532

Visible-Frequency Metasurface for Structuring and Spatially Multiplexing Optical Vortices

Adv Mater. 2016 Apr 6;28(13):2533-9. doi: 10.1002/adma.201504532. Epub 2016 Feb 2.

Authors

M Q Mehmood¹, Shengtao Mei^{1

2}, Sajid Hussain¹, Kun Huang³, S Y Siew¹, Lei Zhang¹, Tianhang Zhang¹, Xiaohui Ling^{1

4}, Hong Liu³, Jinghua Teng³, Aaron Danner¹, Shuang Zhang⁵, Cheng-Wei Qiu^{1

2}

Affiliations

¹ Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583.
² Graduate School for Integrative Sciences and Engineering, National University of Singapore, Centre for Life Sciences (CeLS), #05-01, 28 Medical Drive, Singapore, 117456, Singapore.
³ Institute of Materials Research and Engineering Agency for Science Technology and Research (A*STAR), Innovis, #08-03, 2 Fusionopolis Way, Singapore, 138634.
⁴ College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang, 421002, China.
⁵ School of Physics & Astronomy, University of Birmingham, Birmingham, B15 2TT, UK.

PMID: 26833667
DOI: 10.1002/adma.201504532

Abstract

A multifocus optical vortex metalens, with enhanced signal-to-noise ratio, is presented, which focuses three longitudinal vortices with distinct topological charges at different focal planes. The design largely extends the flexibility of tuning the number of vortices and their focal positions for circularly polarized light in a compact device, which provides the convenience for the nanomanipulation of optical vortices.

Keywords: babinet-inverted; metalens; multifocus; optical-vortex beam; topological charge.