Spin-enabled plasmonic metasurfaces for manipulating orbital angular momentum of light

Guixin LI, Ming Kang, Shumei Chen, Shuang Zhang, Edwin Yue Bun Pun, Kok Wai CHEAH, Jensen Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

200 Citations (Scopus)

Abstract

Here, we investigate the spin-induced manipulation of orbitals using metasurfaces constructed from geometric phase elements. By carrying the spin effects to the orbital angular momentum, we show experimentally the transverse angular splitting between the two spins in the reciprocal space with metasurface, as a direct observation of the optical spin Hall effect, and an associated global orbital rotation through the effective orientations of the geometric phase elements. Such spin-orbit interaction from a metasurface with a definite topological charge can be geometrically interpreted using the recently developed high order Poincaré sphere picture. These investigations may give rise to an extra degree of freedom in manipulating optical vortex beams and orbitals using "spin-enabled" metasurfaces.

Original languageEnglish
Pages (from-to)4148-4151
Number of pages4
JournalNano Letters
Volume13
Issue number9
DOIs
Publication statusPublished - 11 Sep 2013

Scopus Subject Areas

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

User-Defined Keywords

  • Metasurface
  • optical spin Hall effect
  • orbital rotation
  • spin-orbit interaction

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