ABSTRACT
There are now numerous systems in which random lasing has been demonstrated, all have a gain medium and scatterers. There are two broad types of systems; one has the same materials for gain media and scatterers, whereas the other has separate materials for gain media and scatterers. Some examples of gain and scatterers as the same material include ground Nd:YAG particles,5 clusters of zinc oxide nanoparticles,7 and lms of
CONTENTS
4.3.1 Introduction ...................................................................................................................... 379 4.3.2 Lasing in Polymer Films .................................................................................................380 4.3.3 Random Lasing in Polymer Films ................................................................................. 382 4.3.4 Mapping of Random Lasers ...........................................................................................386 4.3.5 Random Laser Statistical Analysis ................................................................................ 389 4.3.6 Random Lasing Applications ......................................................................................... 391 4.3.7 Summary ........................................................................................................................... 391 Acknowledgments ...................................................................................................................... 392 References ..................................................................................................................................... 392
π-conjugated polymers.8 Some examples of gain and extrinsic scatterers include mixtures of laser dye and titanium dioxide (TiO2) nanoparticles,6 dye in photonic bers,9 dye and liquid crystals,10 dye and glass slides,11 dye and colon tissue,12 and dye in bones.13
