Visible-Frequency Metasurface for Structuring and Spatially Multiplexing Optical Vortices.
basic_science · Level V
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- Record sourced from PubMed, PMID 26833667.
- Also identified by DOI 10.1002/adma.201504532.
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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.