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: http://acs366.phys.msu.su/isna16/Abstracts/BulkAcousticWavesBackwardReflectioninAcoustoOpticMaterialsParatelluriteandCalomel.htm
Дата изменения: Wed Jul 10 21:27:13 2002 Дата индексирования: Mon Oct 1 21:30:13 2012 Кодировка: |
Abstract |
Bulk Acoustic Waves Backward Reflection
in Acousto-Optic Materials Paratellurite and Calomel
N.V.Polikarpova, V.B.Voloshinov
(Department of Oscillation Physics, Faculty of Physics, Moscow State
University, Moscow, Russia)
e-mail:
volosh@osc162.phys. msu.su
The
paper describes results on research of acoustic propagation and relection at a
free boundary in the single crystals of
paratellurite and calomel. The acousto-optic materials of tellurium dioxide and mercury chloride are
characterized by the extremely strong anisotropy of their elastic properties. The anisotropy
results in the bulk waves propagation with the obliquity angles, i.e. the angles between the acoustic
phase and group velocities, as large as 70-74
degrees. It was found that the reflection of the eastic waves at a free
boundary in XY plane of the crystals may be accompanied by a peculiar backward
reflection of the acoustic energy so that
the reflection of the acoustic energy is observed approximately in the
direction of the incident wave propagation.
As found, the angle between the incident and the reflected energy flows in
the crystals may be as small as 5-10
degrees. Application of the examined phenomena in Acousto-Optics is discussed
in the paper. Obvious advantages of acousto-optic instruments designed on base
of the examined wave phenomena are also considered in the report.
Section
: 9