Quasi-two-dimensional diffusive random laser action

Year: 2004

Authors: Gottardo S., Cavalieri S., Yaroshchuk O., Wiersma D.

Autors Affiliation: Europ. Lab. for Nonlinear Spectrosc., INFM, 50019 Sesto Fiorentino (Florence), Italy; Department of Physics, University of Florence, 50019 Sesto Fiorentino (Florence), Italy; Natl. Academy of Science of Ukraine, Institute of Physics, Kyiv, 03028, Ukraine

Abstract: We report on random lasing in a disordered system in which the multiple scattering feedback mechanism can be switched from a three-dimensional random walk to a quasi-two-dimensional type of transport. The emission from this system is anisotropic, extraordinary polarized, and is controlled via an external electric field. The phenomenon is observed in dye-doped polymer dispersed liquid crystals and makes use of the strong scattering anisotropies in these materials.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 93 (26)      Pages from: 263901  to: 263901

More Information: We wish to thank Sushil Mujumdar, Roberto Righini, Marcello Colocci, and Maurizio Artoni for discussions. The work was supported by the European Commission and the INFM project RANDS.
KeyWords: Laser dye; Multiple scattering properties; Polymer dispersed liquid crystals (PDLC); Random laser effect, Anisotropy; Concentration (process); Diffusion; Dispersions; Dyes; Electric field effects; Light polarization; Light scattering; Phenols; Photopolymerization; Polymers; Refractive index; Thin films; Nematic liquid crystals
DOI: 10.1103/PhysRevLett.93.263901

Citations: 167
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