<title>Photoacoustic transformation in gyrotropic media at interaction of two light beams</title>

Abstract

photcacoustic spectra or natural and magnetic circular ;iichrosm for a number of gyrotropic samples. Theoreti-0-8194-1070-5/92/$4.OO

Photoacoustic transformation in magnetically active media under the interaction of opposing light waves

“…In equation (1) and(2), EO = E' + i~" is the tensor of the dielectric permeability, a 0 = a8 + o{ is the pseudoscalar parameter of natural optical activity, and G = G' +iG" is the nonsymmetrical tensor of rank two which is dual to the magnetic gyration vector G. The terms oh and G' describe the natural and induced specific rotation of the polarization plane of the electromagnetic waves, U : and GG" represent natural and magnetic circular dichroism. The rest of the notations in (2) correspond to those adopted in [4]. The PA signal in the gas microphone cell is calculated from equation (2) in the assumption of the Rosencwaig-Gersho model.…”

Use of photoacoustic effect for the detection of phase transitions in liquid crystal mixtures

“…The photoacoustic (PA) technique, being highly sensitive, less time consuming and applicable over a wide spectral region, has produced numerous interesting results in liquid crystal characterization [25][26][27]. The PA technique is based on the periodic heating of a sample illuminated by the absorption of modulated optical radiation.…”