Photophysical and Lasing Properties of Rh6G Confined Polymeric Nanoparticles Suspension

The photophysics and laser action of the organic dye Rhodamine 6G (Rh6G) confined in polymeric nanoparticles, mainly based on copolymers of methyl methacrylate (MMA) and 2-hydroxyethylmethacrylate (HEMA), are analyzed as a function of dye concentration, as well as size of the latex particles. The optical properties of these suspensions are found to be dependent on the nanoparticle size. The dye encapsulation in latex particles leads to observe high fluorescence and this fact impels us to study these systems as active media for tunable lasers, since they show a good lasing performance by non-resonant feedback of the emission. These materials open new routes to active disorder-based photonic devices.