title: Polarization-selective coupling to long-range surface plasmon polariton waveguides.
abstract: 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.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts, United States.
authors.forename: J P Balthasar
authors.initials: JP
authors.lastname: Mueller
authors.forename: Kristjan
authors.initials: K
authors.lastname: Leosson
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso
keywords: Long-range surface plasmon polaritons; beam splitters; couplers; metasurfaces; plasmonic antenna arrays; polarization-selective devices