A Random laser is an unconventional laser whose cavity is formed by optical scattering in a disordered medium. We realize random lasing with resonant feedback in disordered semiconductor power and polycrystalline films. We have invented a new type of microlaser - a micro random laser - by utilizing strong scattering for optical confinement.
We investigate the effects of coherent amplification on mesoscopic transport of photons in disordered structures. The near-field scanning optical microscopy allows us to probe the transport and localization of optical excitations in metal-dielectric nanostructures.
This project is focused on the application of chaotic microcavities to microlasers. A chaotic microcavity may produce directional laser output. We optimize lasing in a chaotic microcavity by tailoring the shape factor.
Photonic crystals are periodic structures with allowed and forbidden bands for light propagation. We are employing the photonic bands to reduce the threshold of UV lasers and to increase the efficiency of UV LEDs.