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Surface Plasmon Enhancement at a Liquid–Metal–Liquid Interface

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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.

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Acknowledgements

This research was supported by start up funds provided to FEH and SZ by the Department of Chemistry, University of Central Florida, and the In-House Research Award (# 11649003), UCF.

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Authors and Affiliations

  1. College of Optics & Photonics/CREOL & FPCE, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA

    Ion Cohanoschi & Florencio E. Hernández

  2. Department of Chemistry, University of Central Florida, P.O. Box 162366, Orlando, FL, 32816-2366, USA

    Ion Cohanoschi, Arthur Thibert, Carlos Toro, Shengli Zou & Florencio E. Hernández

Authors
  1. Ion Cohanoschi
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  2. Arthur Thibert
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  3. Carlos Toro
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  4. Shengli Zou
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  5. Florencio E. Hernández
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Corresponding author

Correspondence to Florencio E. Hernández.

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Cohanoschi, I., Thibert, A., Toro, C. et al. Surface Plasmon Enhancement at a Liquid–Metal–Liquid Interface. Plasmonics 2, 89–94 (2007). https://doi.org/10.1007/s11468-007-9030-2

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  • DOI: https://doi.org/10.1007/s11468-007-9030-2

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