Korotchenkov O. Threshold acousto-optical phenomena in crystals and low-dimensional structures

The dissertation is devoted to investigations of threshold acousto-optical phenomena in crystals and low-dimensional semiconductor structures at ultrasonic loading. The threshold phenomena of acoustophotoconductivity of solids, ultrasound-induced electron emission from the surface of ZnS, remarkable narrowing of the band gap of semiconductors at ultrasonic loading, sonoluminescence in granular media are investigated for the first time. New acousto-optical techniques are developed to identify point defects and dislocations in crystals, particularly those localized at the semiconductor substrate/thin layer interface, new method of studying microparticle packing effects is found to arise from capturing the spatial distribution of sonoluminescence intensities. The possibility of driving of the recombination kinetics of excitons bounded in quantum wells and excitonic complexes is demonstrated. The effects observed and the techniques developed are the basis for their applications in investigations of the qua lity of interfaces in solids, drivings of the dynamics of photoexcited carriers in semiconductors, dynamical processes in granular mixtures by utilising ultrasonic loading, etc.