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Title: Photoacoustic transformation of Bessel light beams in magnetoactive superlattices

Photoacoustic transformation of the TE mode of a Bessel light beam (BLB) has been studied for piezoelectric detection in short-period superlattices formed by magnetoactive crystals of bismuth germanate (Bi{sub 12}GeO{sub 20}) and bismuth silicate (Bi{sub 12}SiO{sub 20}) types. It is shown that the resulting signal amplitude can be controlled using optical schemes of BLB formation with a tunable cone angle. A resonant increase in the signal amplitude has been found in the megahertz range of modulation frequencies and its dependences on the BLB modulation frequency, geometric sizes of the two-layer structure and piezoelectric transducer, radial coordinate of the polarization BLB mode, and dissipative superlattice parameters are analyzed.
Authors:
 [1] ; ; ;  [2]
  1. Belarusian Trade and Economics University of Consumer Cooperatives (Belarus)
  2. Gomel State University (Belarus)
Publication Date:
OSTI Identifier:
22472403
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 60; Journal Issue: 2; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BESSEL FUNCTIONS; BISMUTH COMPOUNDS; CRYSTALS; GERMANATES; LAYERS; MHZ RANGE; MODULATION; PHOTON BEAMS; PIEZOELECTRICITY; POLARIZATION; SILICATES; SUPERLATTICES; TRANSDUCERS; VISIBLE RADIATION