title: Cosine-Gauss plasmon beam: a localized long-range nondiffracting surface wave.
abstract: A new surface wave is introduced, the cosine-Gauss beam, which does not diffract while it propagates in a straight line and tightly bound to the metallic surface for distances up to 80 μm. The generation of this highly localized wave is shown to be straightforward and highly controllable, with varying degrees of transverse confinement and directionality, by fabricating a plasmon launcher consisting of intersecting metallic gratings. Cosine-Gauss beams have potential for applications in plasmonics, notably for efficient coupling to nanophotonic devices, opening up new design possibilities for next-generation optical interconnects.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Jiao
authors.initials: J
authors.lastname: Lin
authors.forename: Jean
authors.initials: J
authors.lastname: Dellinger
authors.forename: Patrice
authors.initials: P
authors.lastname: Genevet
authors.forename: Benoit
authors.initials: B
authors.lastname: Cluzel
authors.forename: Frederique
authors.initials: F
authors.lastname: de Fornel
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso