Polarization-Selective Coupling to Long-Range Surface Plasmon Polariton Waveguides

We demonstrate polarization-selective coupling from an optical fiber to long-range surface plasmon polariton waveguide modes using plasmonic antenna arrays. The arrays allow the sorting of two distinct (not necessarily orthogonal) polarizations to counter-propagating waveguide modes. The polarizatio...

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Bibliographic Details
Published in:Nano letters 2014-10, Vol.14 (10), p.5524-5527
Main Authors: Mueller, J. P. Balthasar, Leosson, Kristjan, Capasso, Federico
Format: Article
Language:English
Subjects:
Antenna arrays
Arrays
Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Devices
Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures
Exact sciences and technology
Joining
Physics
Plasmonics
Plasmons
Polaritons
Surface and interface electron states
Waveguides
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Description
Summary:We demonstrate polarization-selective coupling from an optical fiber to long-range surface plasmon polariton waveguide modes using plasmonic antenna arrays. The arrays allow the sorting of two distinct (not necessarily orthogonal) polarizations to counter-propagating waveguide modes. The polarization-selective behavior of the devices is described by a compact formalism based on Stokes vectors that offers a clear graphical representation of the response. We experimentally observe polarization-controlled switching and unidirectional coupling with extinction ratios greater than 30 dB and coupling efficiencies comparable to those of a conventional grating coupler.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl501860r