Abstract
Attenuated total reflection (ATR) properties, scattered light and emission due to surface plasmon polariton (SPP) excitation from Ag film and merocyanine (MC) LB film on Ag film were investigated. A Kretschmann configuration of the ATR measurement, prism/Ag film/air or prism/Ag film/MC LB film/air structures were used for the SPP excitation. The thicknesses and the dielectric constants of the Ag and the MC LB films were obtained from the ATR measurement. Scattered lights due to the SPP excitation were also observed from the Ag thin film and the MC LB film in the ATR measurement. Furthermore, emission was observed through the prism when a laser beam was irradiated to the sample from the air. The angles of the emission peaks almost corresponded to the resonant angles of the ATR curves. It was considered that the emission was due to the SPP excitation and depended on the surface roughness of the films. The intensities of the emission from the Ag film strongly depended on the incident angle of the laser beam.
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