title: Ultrafast plasmon propagation in nanowires characterized by far-field spectral interferometry.
abstract: Spectral interferometry is employed to fully characterize amplitude and phase of propagating plasmons that are transmitted through silver nanowires in the form of ultrashort pulses. For nanowire diameters below 100 nm, the plasmon group velocity is found to decrease drastically in accordance with the theory of adiabatic focusing. Furthermore, the dependence of the plasmon group velocity on the local nanowire environment is demonstrated. Our findings are of relevance for the design and implementation of nanoplasmonic signal processing and in view of coherent control applications.
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Rewitz
authors.forename: Thomas
authors.initials: T
authors.lastname: Keitzl
authors.forename: Philip
authors.initials: P
authors.lastname: Tuchscherer
authors.forename: Jer-Shing
authors.initials: JS
authors.lastname: Huang
authors.forename: Peter
authors.initials: P
authors.lastname: Geisler
authors.forename: Gary
authors.initials: G
authors.lastname: Razinskas
authors.forename: Bert
authors.initials: B
authors.lastname: Hecht
authors.forename: Tobias
authors.initials: T
authors.lastname: Brixner
mesh_terms: D007368:Interferometry / Q000379:methods*; D008027:Light; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D012031:Refractometry; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*