PHYSICS

Thermooptical excitation of sound by Bessel light beams in layered media with internal stress

G. S. Mityurich^ab, E. V. Lebedeva^b, M. Aleksiejuk^c, A. N. Serdyukov<sup>a

a</sup> F. Sсorina Gomel State University
^b Belarusian Trade and Economics University of Consumer Cooperatives, Gomel
^c Institute of Fundamental Technological Research Polish Academy of Sciences, Warsaw

Abstract: The results of investigation of photoacoustic transformation of different modes BLB in gyrotropic layered media are submitted at piezoelectric detection method of registration of a resulting signal. Following the obtained expressions, it is showed that the amplitude of a photoacoustic signal is determined by the thermophysical characteristics of layered media with internal stress, absorption coefficient and parameter of circular dichroism of gyrotropic layered media, polarization and energy characteristics of BLB, frequency of amplitude modulation, and also by geometry system piezolelectric sensor–gyrotropic layered sample.

Keywords: photoacoustic transformation, piezoelectric spectroscopy, Bessel light beam, energy dissipation, Bessel function, heat equation, gyrotropic layered media, Murnaghan constants, Lame coefficients.

UDC: 535.16:534.341

Received: 26.07.2018

Language: English