Resonance compression of an acoustic beam in a crystal

The resonance excitation of an intense acoustic beam in a crystal is described for a special geometry of pump-wave reflection from the crystal surface. The resonance appears in the vicinity of the total internal reflection angle under the condition that the wave field in a compressed reflected beam...

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Bibliographic Details
Published inJournal of experimental and theoretical physics Vol. 122; no. 4; pp. 689 - 704
Main Authors Alshits, V. I., Bessonov, D. A., Lyubimov, V. N.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2016
Springer
Subjects
ACOUSTICS
BEAMS
BOUNDARY CONDITIONS
Classical and Quantum Gravitation
COMPRESSION
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONVERSION
CRYSTALS
Elementary Particles
EXCITATION
MONOCLINIC LATTICES
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theory
REFLECTION
Relativity Theory
RESONANCE
Solid State Physics
Solids and Liquids
SOUND WAVES
SURFACES
SYMMETRY
Optimal Trajectory
Symmetry Plane
Hexagonal Crystal
Acoustic Beam
Stilbene
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Summary:The resonance excitation of an intense acoustic beam in a crystal is described for a special geometry of pump-wave reflection from the crystal surface. The resonance appears in the vicinity of the total internal reflection angle under the condition that the wave field in a compressed reflected beam propagating almost parallel to the surface is close to the volume eigenmode satisfying the free boundary condition. Criteria for the existence of such modes are considered in detail. Conversion conditions are analyzed under which a “parasitic” reflected wave of the same branch as the incident wave is absent and entire energy from the incident wave falls within a narrow intense acoustic beam of another branch. It is shown that, when the surface is chosen parallel to the crystal symmetry plane, the conversion criterion is reduced to the sole condition on the elastic moduli of the medium. Analysis is performed by analytic and numerical methods for skew cuts of monoclinic, rhombic, trigonal, and hexagonal crystals, when the boundary is the symmetry plane, while the sagittal plane has no symmetry. A number of crystals are found in which resonance excitation is very close to conversion.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776116020151