Metalens for Generating a Customized Vectorial Focal Curve

Ruoxing Wang, Yuttana Intaravanne, Songtao Li, Jin Han, Shumei Chen, Jianlong Liu, Shuang Zhang, Li Li, Xianzhong Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Three-dimensional (3D) light fields with spatially inhomogeneous polarization and intensity distributions play an increasingly important role in photonics due to their peculiar optical features and extra degrees of freedom for carrying information. However, it is very challenging to simultaneously control the intensity profile and polarization profile in an arbitrary manner. Here we experimentally demonstrate a metalens that can focus light into an arbitrarily shaped focal curve with a predefined polarization distribution. The efficacy of this approach is exemplified through the demonstration of focused curves in 3D space ranging from simple shapes such as a circle to topologically nontrivial objects such as a 3D knot with controlled local polarization states. This powerful control of the light field would be technically challenging with their conventional counterparts. Our demonstration may find applications in beam engineering and integration optics.

Original languageEnglish
Pages (from-to)2081-2087
Number of pages7
JournalNano Letters
Volume21
Issue number5
Early online date25 Feb 2021
DOIs
Publication statusPublished - 10 Mar 2021

Keywords

  • arbitrary focal curve
  • metalens
  • optical metasurfaces
  • polarization profile engineering

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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