Surface Skimming Bulk Wave, SSBW

Lewis, M.F.

doi:10.1109/ultsym.1977.196936

Cited by 82 publications

(17 citation statements)

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“…This velocity compares favorably with the Rayleigh SAW velocity of the glass substrates, 3100 m/s for soda lime glass. The upper branch, propagating at a velocity of 5590 ± 15 m/s, is the in-plane longitudinal acoustic wave, which has been termed previously as a surface skimming longitudinal wave (SSLW) [10], or the surface skimming bulk wave (SSBW) [11], an elastic excitation that has been used extensively for nondestructive material evaluation [12,13]. Again, the velocity is very close to the longitudinal sound velocity in glass (literature value 5400 m/s) due to the predominant concentration of elastic energy in the substrate.…”

Section: Experimental Techniquementioning

confidence: 99%

Ultrafast magnetoelastic probing of surface acoustic transients

et al. 2016

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We generate in-plane magnetoelastic waves in nickel films using the all-optical transient grating technique. When performed on amorphous glass substrates, two dominant magnetoelastic excitations can be resonantly driven by the underlying elastic distortions, the Rayleigh surface acoustic wave and the surface skimming longitudinal wave. An applied field, oriented in the sample plane, selectively tunes the coupling between magnetic precession and one of the elastic waves, thus demonstrating selective excitation of coexisting, large-amplitude magnetoelastic waves. Analytical calculations based on the Green's function approach corroborate the generation of multiple surface acoustic transients with disparate decay dynamics.

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Section: Experimental Techniquementioning

confidence: 99%

Ultrafast magnetoelastic probing of surface acoustic transients

et al. 2016

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“…Accordingly, at large gaps the acoustic waves see essentially a free surface and the throughput is nearly all LSAW which has very low attenuation ( < lop4 dB/X) on a free surface [ 131. The SSBW, on the other hand is significantly attenuated by both the usual saggital plane diffraction into the bulk [6] plus a less intuitively obvious yet predominant inverse X-' power loss, where P varies from 1 to 3 depending on the separation parameter X, predicted theoretically [l71 for our nearly 3000-X long devices.…”

Section: Discussionmentioning

confidence: 69%

Propagation of transverse bulk and surface acoustic waves in LiNbO/sub 3/ variable time-delay devices

Thaxter¹,

Carr²,

Silva³

1988

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Experimental measurements are reported on voltage-controlled acoustic time-delay lines operating at 1 GHz in the nearly pure shear-horizontal (S-H) mode in 38 degrees rotated Y-cut LiNbO(3). The high-acoustic velocity (4800 m/s) in conjunction with the large electroacoustic effect exhibited by this orientation allows high-frequency operation and optimum time-delay tuning sensitivity with a planar, single surface, device geometry. The authors demonstrate fractional time delay of 0.3x10(-6) V(-1 ) for surface electrodes that produce an in-plane E-field. However, the simultaneous excitation and propagation of both a leaky surface-acoustic wave (LSAW) and surface skimming bulk wave (SSBW), both as (nearly pure) S-H waves in these devices, seriously restricts the extent to which it is possible to maximize the time delay modulation sensitivity by reducing electrode gap spacing as done in similar SAW devices. The LSAW and surface-skimming body wave (SSBW) propagate at nearly the same velocity on a free surface, and perturbation of their velocity and relative attenuation rates by surface electrodes causes pronounced interference effects between the two modes for some device geometries.

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“…1). The principal objectives of the present program were: (1) to experimentally measure the sensor related properties of the most promising SSAW configuration, (2) to optimize that .. *.…”

Section: Program Scope and Objectivesmentioning

confidence: 99%

Research and Development of Subsurface Acoustic Wave Devices for Sensor Applications.

Cullen¹,

Grudkowski²

1985

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Surface Skimming Bulk Wave, SSBW

Cited by 82 publications

References 0 publications

Ultrafast magnetoelastic probing of surface acoustic transients

Ultrafast magnetoelastic probing of surface acoustic transients

Propagation of transverse bulk and surface acoustic waves in LiNbO/sub 3/ variable time-delay devices

Research and Development of Subsurface Acoustic Wave Devices for Sensor Applications.

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