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Surface-enhanced Brillouin scattering on silver films
Phys. Rev. B 31, 3361 – Published 15 March, 1985
DOI: https://doi.org/10.1103/PhysRevB.31.3361
Abstract
We report the first observation of surface-enhanced Brillouin scattering involving the intimate interaction of the extended surface-plasmon (SP) polaritons of a silver film on a glass substrate with the thermal-equilibrium surface acoustic waves of the film. The role of the SP in the Brillouin scattering process is demonstrated and analyzed for a particular optical configuration, specifically, SP generation in the attenuated-total-reflection Kretschmann geometry, with Brillouin scattering observed on the air side of the silver film. Good agreement is obtained between theory and experiment, both in the form of the resonance in the Brillouin scattering signal and in the magnitude of the enhancement by the SP.
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