Observation of Radiation-Controlled Linewidth Narrowing in Disordered TiO₂:Dye Media
Leonid A. Kochkurov1, Dmitry A. Zimnyakov1,2;
1Yury Gagarin State Technical University of Saratov; 2Precision Mechanics and Control Institute of Russian Academy of Sciences
Abstract
The experimental results on the dynamics of the emission spectrum in suspensions of anatase (TiO₂) nanoparticles sensitized with organic dyes (R6G, DCM, pyridine) under pulsed pumping at 532 nm are presented. A pronounced narrowing of the spectral line width Δλ with increasing pump energy is observed for all studied systems, reaching a saturable minimum value. The obtained data demonstrate the universal nature of the narrowing phenomenon, independent of the type of dye used. The system is proposed as a promising platform for studying amplification and scattering processes in the context of stochastic laser generation in disordered media.
Speaker
Leonid Kochkurov
Yuri Gagarin State Technical University of Saratov
Russia
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