Independent and intensity-adjustable dual-focused vortex beams via a helicity-multiplexing metalens

Qun Hao, Wenli Wang, Yao Hu*, Shaohui Zhang, Shuo Zhang, Yu Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Independently tailoring two or more focused vortex beams and controlling their intensity distributions in one device is indispensable in optical trapping and manipulation fields. We propose the phase equation for a helicity-multiplexing metalens generating dual-focused vortex beams based on the propagation phase and geometry phase. The metalens can independently manipulate dual-focused vortex beams, i.e., their focal lengths, lateral displacements, and topological charges could be independently tailored. Moreover, we can adjust their relative focal intensity by modulating the ellipticity of the incident beam. Such metalenses allow for advanced research and applications in trapping and rotating microparticles.

Original languageEnglish
Pages (from-to)3872-3881
Number of pages10
JournalOptical Materials Express
Volume12
Issue number10
DOIs
Publication statusPublished - 1 Oct 2022

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