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 TiO<sub>2</sub> 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.
© 2003 Optical Society of America
Márcio A. R. C. Alencar, Anderson S. L. Gomes, and Cid B. de Araújo, "Directional laserlike emission from a dye-doped polymer containing rutile nanoparticles," J. Opt. Soc. Am. B 20, 564-567 (2003)