Open AccessSurface plasmon-coupled emission on plasmonic Bragg gratings
Author(s) -
Mana Toma,
Koji Toma,
Pavel Adam,
Jiřı́ Homola,
Wolfgang Knoll,
Jakub Dostálek
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.014042
Subject(s) - surface plasmon , plasmon , materials science , optics , localized surface plasmon , surface plasmon polariton , refractive index , grating , fiber bragg grating , optoelectronics , diffraction grating , wavelength , physics
Surface plasmon-coupled emission (SPCE) from emitters in a close proximity to a plasmonic Bragg grating is investigated. In this study, the directional fluorescence emission mediated by Bragg-scattered surface plasmons and surface plasmons diffraction cross-coupled through a thin metallic film is observed by using the reverse Kretschmann configuration. We show that controlling of dispersion relation of these surface plasmon modes by tuning the refractive index at upper and lower interfaces of a dense sub-wavelength metallic grating enables selective reducing or increasing the intensity of the light emitted to certain directions. These observations may provide important leads for design of advanced plasmonic structures in applications areas of plasmon-enhanced fluorescence spectroscopy and nanoscale optical sources.