title: Surface plasmon mediated strong exciton-photon coupling in semiconductor nanocrystals.
abstract: We present an experimental demonstration of strong coupling between a surface plasmon propagating on a planar silver thin film and the lowest excited state of CdSe nanocrystals. Attenuated total reflection measurements demonstrate the formation of plasmon-exciton mixed states, characterized by a Rabi splitting of approximately 112 meV at room temperature. Such a coherent interaction has the potential for the development of nonlinear plasmonic devices, and furthermore, this system is akin to those studied in cavity quantum electrodynamics, thus offering the possibility to study the regime of strong light-matter coupling in semiconductor nanocrystals under easily accessible experimental conditions.
authors.affiliation: CSIRO, Materials Science and Engineering, Clayton, Victoria 3168, Australia. Daniel.Gomez@csiro.au
authors.forename: D E
authors.initials: DE
authors.lastname: Gómez
authors.forename: K C
authors.initials: KC
authors.lastname: Vernon
authors.forename: P
authors.initials: P
authors.lastname: Mulvaney
authors.forename: T J
authors.initials: TJ
authors.lastname: Davis
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D003102:Colloids / Q000737:chemistry; D003460:Crystallization; D004563:Electrochemistry / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D017785:Photons; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D012666:Semiconductors; D012834:Silver / Q000737:chemistry; D020349:Surface Plasmon Resonance; D013696:Temperature
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; D012834:Silver; C058667:cadmium selenide