title: Highly confined hybrid spoof surface plasmons in ultrathin metal-dielectric heterostructures.
abstract: Highly confined "spoof" surface plasmons (SSPs) are theoretically predicted to exist in a perforated metal film coated with a thin dielectric layer. Strong modes confinement results from the additional waveguiding by the layer. Spectral characteristics, field distribution, and lifetime of these SSPs are tunable by the holes' size and shape. SSPs exist both above and below the light line, offering two classes of applications: "perfect" far-field absorption and efficient emission into guided modes. It is experimentally shown that these plasmonlike modes can turn thin, weakly absorbing semiconductor films into perfect absorbers.
authors.affiliation: Department of Physics, University of Texas at Austin, 78712, USA.
authors.forename: S Hossein
authors.initials: SH
authors.lastname: Mousavi
authors.forename: Alexander B
authors.initials: AB
authors.lastname: Khanikaev
authors.forename: Burton
authors.initials: B
authors.lastname: Neuner
authors.forename: Yoav
authors.initials: Y
authors.lastname: Avitzour
authors.forename: Dmitriy
authors.initials: D
authors.lastname: Korobkin
authors.forename: Gabriel
authors.initials: G
authors.lastname: Ferro
authors.forename: Gennady
authors.initials: G
authors.lastname: Shvets