Large enhancement of fluorescence efficiency from CdSe/ZnS quantum dots induced by resonant coupling to spatially controlled surface plasmons.
Nanoengineered fluorescent response is reported from semiconductor core-shell (CdSe/ZnS) quantum dots in proximity to the surface plasmon polariton field of periodic Ag nanoparticle arrays. Tuning the surface plasmon polariton resonance to the quantum dot exciton emission band results in an enhancement of up to approximately 50-fold in the overall fluorescence efficiency, in a design where each Ag nanoparticle is interconnected by a continuous Ag thin film. Propagating modes of surface plasmon resonances have a direct impact on the fluorescence enhancement.
Song
Jung-Hoon
JH
Division of Engineering and Department of Physics, Brown University, Providence, Rhode Island 02912, USA.
Atay
Tolga
T
Shi
Sufei
S
Urabe
Hayato
H
Nurmikko
Arto V
AV
D019187:Cadmium Compounds / Q000032:analysis / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry*; D045663:Quantum Dots; D018036:Selenium Compounds / Q000032:analysis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013440:Sulfides / Q000032:analysis / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000379:methods*; D017967:Zinc Compounds / Q000032:analysis / Q000737:chemistry*
D019187:Cadmium Compounds; D018036:Selenium Compounds; D013440:Sulfides; D017967:Zinc Compounds; C058667:cadmium selenide; C031238:zinc sulfide