Results 211 to 220 of about 16,946 (263)
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Surface acoustic waves in metals
Journal of Physics C: Solid State Physics, 1984The authors present propagation experiments for surface acoustic waves (SAW) in pure single crystals of aluminium and gallium. Geometric resonances and de Haas-van Alphen oscillations are observed as sound velocity changes. In addition, a typical surface effect, a nonreciprocal effect of the SAW velocity with respect to applied field and propagation ...
J. Heil +3 more
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Surface acoustic wave resonators
European Transactions on Telecommunications, 1991AbstractSurface Acoustic Wave (SAW) resonators are implemented by creating a planar resonant cavity, delimited by two distributed, rather than concentrated, mirrors, consisting of arrays of reflecting metal strips. SAW resonators permit to achieve higher frequencies than their bulk‐wave acoustic counterparts with comparable spectral purity and very ...
Gianfranco Avitabile +3 more
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1970 Ultrasonics Symposium, 1970
Acoustic surface waves offer several advantages in the construction of delay lines and filters in the UHF range. In these devices the frequency response is determined by the finger spacing and overlap of the interdigital comb structures used as input and output transducers.
R.H. Tancrell, M.G. Holland
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Acoustic surface waves offer several advantages in the construction of delay lines and filters in the UHF range. In these devices the frequency response is determined by the finger spacing and overlap of the interdigital comb structures used as input and output transducers.
R.H. Tancrell, M.G. Holland
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IEEE 1991 Ultrasonics Symposium, 2002
Piezoelectric semiconductors such as GaAs are of interest for signal processing devices due to the possibility of monolithic integration of SAW and active electronic circuits on the same substrate. The common crystal orientation of GaAs used in the surface acoustic wave (SAW) devices is the (110) propagating wave in the (100) plane, which supports a ...
V.M. Bright, Y. Kim, W.D. Hunt
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Piezoelectric semiconductors such as GaAs are of interest for signal processing devices due to the possibility of monolithic integration of SAW and active electronic circuits on the same substrate. The common crystal orientation of GaAs used in the surface acoustic wave (SAW) devices is the (110) propagating wave in the (100) plane, which supports a ...
V.M. Bright, Y. Kim, W.D. Hunt
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The Journal of the Acoustical Society of America, 2007
A surface acoustic wave element includes a thin film electrode composed of monocrystal aluminum disposed on a piezoelectric substrate. At least one metal of Cu, Ta, W, and Ti is segregated in the thin film electrode composed of monocrystal aluminum. In this surface acoustic wave element, segregation of Cu or the like occurs in the thin film electrode ...
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A surface acoustic wave element includes a thin film electrode composed of monocrystal aluminum disposed on a piezoelectric substrate. At least one metal of Cu, Ta, W, and Ti is segregated in the thin film electrode composed of monocrystal aluminum. In this surface acoustic wave element, segregation of Cu or the like occurs in the thin film electrode ...
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Surface acoustic wave manipulation of bioparticles
Soft Matter, 2023The SAW technology has emerged as an important tool for manipulating bioparticles, so we introduce the recent advancements in the manipulation of organisms based on standing and traveling SAWs, including separation, concentration, and transport.
Meili Qi +5 more
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Nonlinear piezoelectric surface acoustic waves
The Journal of the Acoustical Society of America, 2022The theory for nonlinear surface acoustic waves in crystals developed using Hamiltonian mechanics [Hamilton, Il'inskii, and Zabolotskaya, J. Acoust. Soc. Am. 105, 639 (1999)] is modified to account for piezoelectric material properties. The derived spectral evolution equations permit analysis of nonlinear surface wave propagation along a cut surface of
John M. Cormack +3 more
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1985
In 1887 Lord Rayleigh(1) showed that a semi-infinite, isotropic, elastic medium, bounded by a single, stress-free, planar surface, can support surface vibration modes that are wavelike in directions parallel to the surface of the solid, but whose amplitudes decay exponentially with increasing distance into the solid from the surface, with a decay ...
V.A. Krasil'nikov, Krylov, Victor V.
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In 1887 Lord Rayleigh(1) showed that a semi-infinite, isotropic, elastic medium, bounded by a single, stress-free, planar surface, can support surface vibration modes that are wavelike in directions parallel to the surface of the solid, but whose amplitudes decay exponentially with increasing distance into the solid from the surface, with a decay ...
V.A. Krasil'nikov, Krylov, Victor V.
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The Journal of the Acoustical Society of America, 1973
Abstract : The article surveys the essential results obtained concerning acoustic surface waves on curved surfaces, and establishes their relationships with the corresponding plane surface waves. In view of the limited generality of the existing literature, the excitation mechanisms considered here for the generation of such surface waves have mostly ...
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Abstract : The article surveys the essential results obtained concerning acoustic surface waves on curved surfaces, and establishes their relationships with the corresponding plane surface waves. In view of the limited generality of the existing literature, the excitation mechanisms considered here for the generation of such surface waves have mostly ...
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Surface acoustic wave tactile display
IEEE Computer Graphics and Applications, 2001Developing realistic tactile displays for virtual reality has been challenging. Tangible displays are increasingly important interfaces not only for augmenting the reality of computer graphics but also for conveying graphical information to persons with visual impairments. We propose a tactile display using surface a acoustic waves. We can continuously
Takaaki Nara +5 more
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