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Proceedings Paper

Microwave polarization echoes in piezoelectric powders
Author(s): T. Ya. Asadullin; Ya. Ya. Asadullin; Vitaly V. Samartsev
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Paper Abstract

It is proposed that the lack of memory components in microwave polarization echoes in ZnO powders is a consequence of absence of mobile dislocations in the powder material used. We suggest a somewhat modified form of the nonlinear mechanism related to the lattice anharmonicity: amplitude dependent dispersion and damping. General expression for dynamic two pulse echoes is derived by use jointly all the three known types of nonlinear mechanisms inherent in pure elastic lattice. The numerical analysis of this expression as a function of the pulse amplitudes, the pulse widths and the pulse separation shows good agreement between the theory and the existing experiments in broad range of amplitudes and widths of the pulses. Several important material constants relevant to the nonlinear mechanisms in ZnO powder are estimated as fitting parameters.

Paper Details

Date Published: 26 September 1997
PDF: 5 pages
Proc. SPIE 3239, Photon Echo and Coherent Spectroscopy, (26 September 1997); doi: 10.1117/12.287663
Show Author Affiliations
T. Ya. Asadullin, Kazan State Technical Univ. (Russia)
Ya. Ya. Asadullin, E.K. Zavoisky Physical-Technical Institute (Russia)
Vitaly V. Samartsev, E.K. Zavoisky Physical-Technical Institute (Russia)

Published in SPIE Proceedings Vol. 3239:
Photon Echo and Coherent Spectroscopy
Vitaly V. Samartsev, Editor(s)

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