Conversion acoustic resonances in orthorhombic crystals
- Authors: Lyubimov V.N.1, Bessonov D.A.1, Alshits V.I.1
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Affiliations:
- Shubnikov Institute of Crystallography
- Issue: Vol 61, No 3 (2016)
- Pages: 456-465
- Section: Physical Properties of Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/190026
- DOI: https://doi.org/10.1134/S1063774516030172
- ID: 190026
Cite item
Abstract
A classification of acoustic-beam reflection resonances in orthorhombic crystals under conditions where a proximity to conversion is implemented in the vicinity of total internal reflection is proposed. In this case, the energy from the incident pump beam falls almost entirely into a narrow intense reflected beam propagating at a small angle with respect to the surface. The crystal boundary is parallel to one of the elastic symmetry planes, and the excited beam propagates near one of axes 2 in this plane. Depending on the relations between the elastic moduli and the chosen propagation geometry, 18 types of resonances may occur, but no more than three in each crystal. The developed theory combines an approximate analytical description and accurate computer analysis. The relations between the elastic moduli providing minimum energy loss over the parasite reflected wave are determined. Some crystals with resonant excitation very close to conversion are revealed.
About the authors
V. N. Lyubimov
Shubnikov Institute of Crystallography
Email: valshits@mail.ru
Russian Federation, Leninskii pr. 59, Moscow, 119333
D. A. Bessonov
Shubnikov Institute of Crystallography
Email: valshits@mail.ru
Russian Federation, Leninskii pr. 59, Moscow, 119333
V. I. Alshits
Shubnikov Institute of Crystallography
Author for correspondence.
Email: valshits@mail.ru
Russian Federation, Leninskii pr. 59, Moscow, 119333