Nature Communications (Jul 2022)

Active multiband varifocal metalenses based on orbital angular momentum division multiplexing

  • Ruixuan Zheng,
  • Ruhao Pan,
  • Guangzhou Geng,
  • Qiang Jiang,
  • Shuo Du,
  • Lingling Huang,
  • Changzhi Gu,
  • Junjie Li

DOI
https://doi.org/10.1038/s41467-022-32044-2
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 8

Abstract

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A dielectric metalens consisting of ultrahigh aspect ratio TiO2 nanofins array is demonstrated to realize active multiband varifocal functionality. By regulating the orbital angular momentum, the focal length can be switched from 5 mm to 35 mm with large DOFs.