4.7 Article

High-Efficiency Polarization Multiplexing Metalenses

Journal

NANOMATERIALS
Volume 12, Issue 9, Pages -

Publisher

MDPI
DOI: 10.3390/nano12091500

Keywords

polarization multiplexing metalens; focusing efficiency; polarization; FWHM

Funding

  1. Natural Science Basic Research Program of Shaanxi [2022JQ-676]
  2. Scientific Research Program of Shaanxi Provincial Education Department [21JY017]

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In this paper, we designed orthogonal linear and circular polarization multiplexing metalens using a library of rectangle TiO2 nanostructures. Both metalenses can produce diffraction-limited focal spots for four polarization states with no obvious distortion.
The polarization multiplexing technique is a well-established method that improves the communication capacity of an optical system. In this paper, we designed orthogonal linear and circular polarization multiplexing metalens using a library of rectangle TiO2 nanostructures. The former can independently focus x- and y-linearly polarized incident lights to designed positions with a focusing efficiency of 53.81% and 51.56%, respectively, whereas the latter with two preset focal points can independently control left and right circularly polarized incident lights with a focusing efficiency of 42.45% and 42.46%, respectively. We also show that both metalenses can produce diffraction-limited focal spots for four polarization states with no obvious distortion, which opens up new applications in polarization imaging and polarization detection.

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