Investigation of ultrasonic action effects in quantum heterolasers.

The influence of alternating strains on the spectral characteristics of the radiation of quantum-dimensional heterolasers is studied experimentally and theoretically. A brief review of the previously obtained results of the study of the deformation effect on the frequency spectrum of radiation is presented. A detailed analysis of the results obtained recently in the study of the influence of ultrasonic strain on the polarization properties of laser structures of various compositions is carried out. An anomalously large effect of rotation of polarization by ultrasonic strain has been found in laser structures on quantum dots.

Acousto-optic interaction in nanodimensional laser heterostructures.

Comparative research on fine spectrum analysis techniques (static and dynamic) has been carried out. The advantages of the dynamic method for fine spectrum study of heterolaser radiation as a method of study of the spectrum change under ultrasonic strain have been shown. An approach to fine dynamic spectrum analysis has been developed, and the treatment of experimental data on the spectrum dynamics of the InGaAsP/InP structures in the presence of surface acoustic waves has been carried out. Thus an appreciable contribution of the acousto-optic interaction (comparable with the acousto-electronic interaction), resulting in time modulation of resonance frequencies of the heterolaser optical resonator, was found. The second, no less important, result of the investigation consists of the finding of the possibility to determine phase shifts between acousto-optic and the acousto-electronic interactions.