Vol. 43, Issue 2, pp. 353-358 (2013)

Abstract

IR induced operation by mechanical parameters in complex chalcogenide glasses with a general formulae Sb₂Se_{3 – x}Te_x–BaCl₂–PbCl₂ (with x = 0.2, 0.8, 1.3) was found under the influence of a pulsed 190 ns CO₂ laser and with light power densities varying within 0.5–1.5 GW/cm² with a wavelength 10.6 μm. The monitoring was performed by acoustic sound velocities. It was established that varying x leads to variations in mechanical properties, which is monitored by acoustic sound velocities. This one is a consequence of Ir laser induced variations of electron and phonon polarizations. Simultaneously changes in pump–probe delaying times in a nanosecond time range were explored. The studies allow to determine the maximally achieved acoustic velocity values. A significant role of an electron–phonon subsystem in the observed IR-induced mechanical treatment is demonstrated. Of a particular interest are studies of sound velocity decay properties after switching off the IR-induced laser beam.