A novel scheme for generation of laserlike emission from highly scattering media is presented. A high degree of directionality is obtained owing to the excitation of surface plasmons in a silver film. The electromagnetic energy coupled to surface plasmons is transferred to a polymeric disk containing Rhodamine and TiO2 nanospheres placed in close contact with the film. The fluorescence produced in the disk, outcoupled through a prism, displays features of a “laser paint” plus a high directionality.
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Alencar et al. (2003) studied this question.
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