Surface-enhanced Raman scattering and fluorescence near metal nanoparticles

By P. Johansson, Hongxing Xu, Mikael Kall. 2005

255 citations recorded by the source corpus.

We present a general model study of surface-enhanced resonant Raman scattering and fluorescence, focusing on the interplay between electromagnetic (EM) effects and the molecular dynamics as treated by a density matrix calculation. The model molecule has two electronic levels, is affected by radiative and nonradiative damping mechanisms, and a Franck-Condon mechanism yields electron-vibration coupling. The coupling between the molecule and the electromagnetic field is enhanced by placing it between two Ag nanoparticles. The results show that the Raman scattering cross section can, for realistic parameter values, increase by some 10 orders of magnitude (to similar to 10(-14) cm(2)) compared with the free-space case. Also the fluorescence cross section grows with increasing EM enhancement, however, at a slower rate, and this increase eventually stalls when nonradiative decay processes become important. Finally, we find that anti-Stokes Raman scattering is possible with strong incident laser intensities similar to 1 mW/mu m(2).

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/5756b03d293a03bf013243fc77faf2a3c85784d6

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In Atomic and Molecular Physics, and Optics

S. A. Maier

In Biomedical Engineering

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Recent Progress on Plasmon-Enhanced Fluorescence (2015, background): “With the help of the coupled effect between the plasmon resonancewith the incidencewave and fluorescence emission, the total enhancement factor (EF) can be depicted through the following equations [24, 25]:”
Surface enhanced fluorescence (2008, background): “Most of the published work deals with SERS [195, 196], even if the latter group published a fine theoretical analysis of Raman scattering compared with fluorescence enhancement [27].”
Plasmonics: Fundamentals and Applications (2007, methodology): “Xu and co-workers have shown that the enhancement of Raman scattering and fluorescence near a metallic surface or nanoparticle can be described using a unified treatment [Xu et al., 2004, Johannsson et al., 2005].”