Ultrathin plasmonic chiral phase plate | Zendy

Yuri Gorodetski | Zendy; Cyriaque Genet | Zendy; Thomas W. Ebbesen | Zendy

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Ultrathin plasmonic chiral phase plate

Author(s) -

Yuri Gorodetski,

Cyriaque Genet,

Thomas W. Ebbesen

Publication year - 2016

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.41.004390

Subject(s) - optics , plasmon , angular momentum , optical vortex , phase (matter) , geometric phase , helicity , surface plasmon , physics , materials science , beam (structure) , vortex , condensed matter physics , classical mechanics , quantum mechanics , particle physics , thermodynamics

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.

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