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High efficiency focusing vortex generation and detection with polarization-insensitive dielectric metasurfaces

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Abstract

The optical vortex beam with an orbital angular momentum, featuring a doughnut intensity distribution and a helically structured wavefront, has received extensive attention due to its applications in nanoparticle manipulation and optical communications. In this paper, we propose high-efficiency polarization-independent vortex beam generators which are capable of transforming the arbitrarily polarized plane wave into a focusing optical vortex beam and an abruptly focusing airy vortex beam. Besides, based on holographic metasurfaces, we provide a general design scheme for detecting the topological charges. With such a design strategy, multichannel topological charge resolved devices are demonstrated, which successfully implement the detection of the topological charges from −2 to 2. The metasurfaces designed with a simple and effective method in light manipulation promise photonic applications in secure communications and other related areas.

Graphical abstract: High efficiency focusing vortex generation and detection with polarization-insensitive dielectric metasurfaces

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Publication details

The article was received on 13 Sep 2018, accepted on 30 Sep 2018 and first published on 02 Oct 2018


Article type: Paper
DOI: 10.1039/C8NR07480A
Citation: Nanoscale, 2018, Advance Article
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    High efficiency focusing vortex generation and detection with polarization-insensitive dielectric metasurfaces

    K. Ou, G. Li, T. Li, H. Yang, F. Yu, J. Chen, Z. Zhao, G. Cao, X. Chen and W. Lu, Nanoscale, 2018, Advance Article , DOI: 10.1039/C8NR07480A

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