Hybridized exciton-plasmon polaritons in nanostructured silver films

Nic Cade, Tom Ritman-Meer, David Richards

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

We report on the resonant coupling between localized surface plasmon resonances (LSPRs) in nanostructured Ag films, and an adsorbed monolayer of Rhodamine 6G dye. Hybridization of the plasmons and molecular excitons creates new coupled polaritonic modes, which have been tuned by varying the LSPR wavelength. The resulting polariton dispersion curve shows an anticrossing behavior which is very well fit by a simple coupled-oscillator Hamiltonian, giving a giant Rabi-splitting energy of similar to 400 meV. The strength of this coupling is shown to be proportional to the square root of the molecular density. The Raman spectra of R6G on these films show an enhancement of many orders of magnitude due to surface enhanced scattering mechanisms; we find a maximum signal when a polariton mode lies in the middle of the Stokes shifted emission band.
Original languageEnglish
Title of host publicationUnknown
Place of PublicationBELLINGHAM
PublisherSPIE - INT SOC OPTICAL ENGINEERING
ISBN (Print)978-0-8194-8185-6
Publication statusPublished - 2010
EventConference On Nanophotonics III - Brussels, Belgium
Duration: 12 Apr 201016 Apr 2010

Publication series

NameNANOPHOTONICS III

Conference

ConferenceConference On Nanophotonics III
Country/TerritoryBelgium
CityBrussels
Period12/04/201016/04/2010

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