title: Controlled steering of Cherenkov surface plasmon wakes with a one-dimensional metamaterial.
abstract: In the Cherenkov effect a charged particle moving with a velocity faster than the phase velocity of light in the medium radiates light that forms a cone with a half angle determined by the ratio of the two speeds. Here, we show that by creating a running wave of polarization along a one-dimensional metallic nanostructure consisting of subwavelength-spaced rotated apertures that propagates faster than the surface plasmon polariton phase velocity, we can generate surface plasmon wakes, a two-dimensional analogue of Cherenkov radiation. The running wave of polarization travels with a speed determined by the angle of incidence and the photon spin angular momentum of the incident radiation. By changing either one of these properties we demonstrate controlled steering of the Cherenkov surface plasmon wakes.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, McKay 125, Cambridge, Massachusetts 02138, USA.|Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore.
authors.forename: Patrice
authors.initials: P
authors.lastname: Genevet
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, McKay 125, Cambridge, Massachusetts 02138, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Wintz
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, McKay 125, Cambridge, Massachusetts 02138, USA.|CNR-SPIN U.O.S. Napoli, Dipartimento di Fisica, Complesso Universitario di Monte Sant'Angelo, Università di Napoli Federico II, Via Cintia, Napoli 80126, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Ambrosio
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, McKay 125, Cambridge, Massachusetts 02138, USA.
authors.forename: Alan
authors.initials: A
authors.lastname: She
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, McKay 125, Cambridge, Massachusetts 02138, USA.|Eos Photonics Inc., 30 Spinelli Place, Cambridge, Massachusetts 02138, USA.
authors.forename: Romain
authors.initials: R
authors.lastname: Blanchard
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, McKay 125, Cambridge, Massachusetts 02138, USA.|Eos Photonics Inc., 30 Spinelli Place, Cambridge, Massachusetts 02138, USA.
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso