Acoustic Waves in Absorbing Anisotropic Media

1990 ◽  
pp. 144-164
Author(s):  
Leonid M. Brekhovskikh ◽  
Oleg A. Godin
Keyword(s):  
Acoustic Waves ◽  
Anisotropic Media

Second-order nonlinearity of wedge acoustic waves in anisotropic media

Wave Motion ◽  
2013 ◽  
Vol 50 (2) ◽  
pp. 246-252 ◽  
Author(s):  
Elena S. Sokolova ◽  
Alexander S. Kovalev ◽  
Andreas P. Mayer
Keyword(s):  
Acoustic Waves ◽  
Anisotropic Media ◽  
Second Order ◽  
Second Order Nonlinearity

scholarly journals Acousto-optic devices using acoustic waves refraction

2021 ◽  
Vol 2127 (1) ◽  
pp. 012039
Author(s):  
N V Polikarpova ◽  
I K Chizh
Keyword(s):  
Elastic Waves ◽  
Acoustic Waves ◽  
Energy Flow ◽  
Anisotropic Media ◽  
Generation Process ◽  
Practical Applications ◽  
Technical Parameters ◽  
Acousto Optic Device ◽  
Materials Used ◽  
Flow Propagation

Abstract The methods of acousto-optics provide multiple techniques for controlling optical beam. The technical parameters of corresponding acousto-optic devices are largely determined by the efficiency of acoustic waves generation. In present work we examine the features of elastic waves generation in materials used in acousto-optics. In most of practical applications the elastic wave generation process is implemented through the refraction of elastic waves at the boundary between two anisotropic media. We present a detailed study of the refraction of elastic waves in strongly anisotropic media. We report new refractive effects such as “extraordinary” refraction. In the latter case the change in the direction of the incident acoustic wave does not influence the direction of the energy flow propagation for refracted elastic waves. The configuration of an acousto-optic device using the geometry of unusual refraction in an anisotropic medium is discussed.

Reflection of surface acoustic waves on anisotropic media

1986 ◽  
Vol 59 (8) ◽  
pp. 2660-2665 ◽  
Author(s):  
P. Schiavone ◽  
M. Planat
Keyword(s):  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Anisotropic Media

Forward and inverse problems for surface acoustic waves in anisotropic media: A Ritz–Rayleigh method based approach

Ultrasonics ◽  
2015 ◽  
Vol 56 ◽  
pp. 381-389 ◽  
Author(s):  
Pavla Stoklasová ◽  
Petr Sedlák ◽  
Hanuš Seiner ◽  
Michal Landa
Keyword(s):  
Inverse Problems ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Anisotropic Media ◽  
Rayleigh Method

Modeling of Propagation of Antiplane Acoustic Waves in Multiscale Media with Lognormal Distribution of Parameters

2017 ◽  
Vol 25 (01) ◽  
pp. 1750007
Author(s):  
Olga Soboleva
Keyword(s):  
Lognormal Distribution ◽  
Acoustic Waves ◽  
Isotropic Medium ◽  
Anisotropic Media ◽  
Elastic Stiffness ◽  
Elastic Media ◽  
Effective Coefficient ◽  
Similarity Hypothesis ◽  
Numerical Testing ◽  
Effective Coefficients

The effective coefficients for the problem of propagation of acoustic waves in multifractal elastic media using the subgrid modeling approach are obtained. The maximum scale of heterogeneities of the medium in question is assumed to be small as compared with the wavelength. If a isotropic medium is assumed to satisfy the improved Kolmogorov similarity hypothesis, the term for the effective coefficient of the elastic stiffness coincides with the Landau–Lifshitz–Matheron formula. Both isotropic and anisotropic media are considered. The numerical testing for the wave propagating at a distance, which is of the same order as a typical wavelength of a source, illustrates the efficiency of the approach proposed.

Characterization of RF Sputtered ZnO Piezoelectric Films Using Transmission Electron Microscope

1975 ◽  
Vol 33 ◽  
pp. 86-87
Author(s):  
Kemining W. Yeh ◽  
Richard S. Muller ◽  
Wei-Kuo Wu ◽  
Jack Washburn
Keyword(s):  
Integrated Circuit ◽  
Acoustic Waves ◽  
New Technology ◽  
Surface Acoustic Waves ◽  
Electromechanical Properties ◽  
Leading Role ◽  
Saw Devices ◽  
Transmission Electron ◽  
High Degree

Considerable and continuing interest has been shown in the thin film transducer fabrication for surface acoustic waves (SAW) in the past few years. Due to the high degree of miniaturization, compatibility with silicon integrated circuit technology, simplicity and ease of design, this new technology has played an important role in the design of new devices for communications and signal processing. Among the commonly used piezoelectric thin films, ZnO generally yields superior electromechanical properties and is expected to play a leading role in the development of SAW devices.

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