Plasmonics

, Volume 2, Issue 2, pp 89–94

Surface Plasmon Enhancement at a Liquid–Metal–Liquid Interface

Authors

  • Ion Cohanoschi
    • College of Optics & Photonics/CREOL & FPCEUniversity of Central Florida
    • Department of ChemistryUniversity of Central Florida
  • Arthur Thibert
    • Department of ChemistryUniversity of Central Florida
  • Carlos Toro
    • Department of ChemistryUniversity of Central Florida
  • Shengli Zou
    • Department of ChemistryUniversity of Central Florida
    • College of Optics & Photonics/CREOL & FPCEUniversity of Central Florida
    • Department of ChemistryUniversity of Central Florida
Article

DOI: 10.1007/s11468-007-9030-2

Cite this article as:
Cohanoschi, I., Thibert, A., Toro, C. et al. Plasmonics (2007) 2: 89. doi:10.1007/s11468-007-9030-2

Abstract

Herein, we report the first experimental demonstration of surface plasmon enhancement at a liquid–metal–liquid interface using a pseudo-Kretschmann geometry. Pumping gold nanoparticle clusters at the interface of a p-xylene–water mixture, we were able to measure a fluorescence enhancement of three orders of magnitude in Rose Bengal at an excitation wavelength of 532 nm. The observed increase is due to the local electric field enhancement and the reduction of the fluorescence lifetime of dye molecules in the close vicinity of the metal surface. Theoretical modeling using the T-matrix method of the electric field intensity enhancement of emulated surfaces supports the experimental results. This new approach will open a new road for the study of dynamic systems using plasmonics.

Keywords

Surface plasmon resonanceFluorescence enhancementLiquid–metal–liquid interface

Copyright information

© Springer Science+Business Media, LLC 2007