Ultrathin plasmonic chiral phase plate

Yuri Gorodetski, Cyriaque Genet, Thomas W. Ebbesen

Research output: Contribution to journalArticlepeer-review

Abstract

A thin free-standing gold membrane with complex plasmonic structures engraved on both sides is shown to perform as an ultrathin phase plate. Specifically, we demonstrate the generation of a far-field vortex beam propagating at a desired angle. The angular momentum of the beam is generated by the groove helicity, together with the geometric phase arising from a plasmonic spin-orbit interaction. The radial chirp of the back-side structure is used to modify the emission angle via a specific momentum matching condition.

Original languageEnglish
Pages (from-to)4390-4393
Number of pages4
JournalOptics Letters
Volume41
Issue number18
DOIs
StatePublished - 15 Sep 2016

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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