Surface acoustic waves in quasi-composite near-surface microstructured layers

Kapelewski, J.; Pasternak, M.

doi:10.1163/156855496x00074

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…The SW scattered wave can than be written in the following form (Kapelewski, 1991;Kapelewski, Pasternak, 1996):…”

Section: Description Of the Model Treatmentmentioning

confidence: 99%

“…In a series of previous works (Kapelewski, Pasternak, 1996;1999) we developed a method of using a surface 2D quasicomposite array composed of altered phase clusters which play the role of antenna elements when irradiating by a surface (Rayleigh) wave.…”

Section: Introductionmentioning

confidence: 99%

“…We shall not dwell here on the merit of the method over more conventional electronically controlled 2D antenna arrays, which was thoroughly discussed elsewhere (Kapelewski, Pasternak, 1996;1999;Kapelewski, 1991). In this paper we consider an analogous problem for the case when the array of altered phase clusters (as before (Angel, Achenbach, 1985;Claus, 1978) modelled by dipole-force dilation centers distribution in the host region) is situated at the interface between two (similar or identical but differently oriented) solids, and the excitation is provided by the SW propagating along the perturbed interface plane.…”

Section: Introductionmentioning

confidence: 99%

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Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase

Kapelewski¹,

Lila²

2011

Archives of Acoustics

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The purpose of the paper is to outline a systematic and unified non-local treatment of mode conversion effects associated with an interface superlattice being a 2D pseudo-array composed of altered phase inclusions (exemplified by impurity clusters) and located at a solid-solid plane interface. It will be illustrated, in some detail, for the instructive case of a Stoneley type acoustic wave (SW), incident on a periodically nonhomogeneous portion of an interface and partly transformed into bulk modes propagating in one of the component solid. An analytical model scheme is constructed, using a variational method combined with the T matrix approach, appropriate for the 2D periodic array treated, and decaying into the depth of this solid for the structure in a way determined by the array geometry and element 3D profiles as well as the boundary conditions at the interface. An apodization (weighting) to reduce the side-lobes level is incorporated into the structure by appropriately varying lateral dimensions and the depth of particular scatterers.

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“…The SW scattered wave can than be written in the following form (Kapelewski, 1991;Kapelewski, Pasternak, 1996):…”

Section: Description Of the Model Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase

Kapelewski¹,

Lila²

2011

Archives of Acoustics

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show abstract

“…Apart from this, the upper range of working frequencies is strongly limited by piezoelectric lead zirconate titanate (PZT)-type materials which have been used in mentioned "classic" composite arrays. The possibility of the grating acoustic scanner (GAS) using as an electronically focused and scanned transmitter and receiver for acoustic imaging have been previously shown in [4,5]. Such grating scanner relied on mode conversion of surface acoustic waves (SAW) to bulk acoustic waves (BAW) for the generating of directed acoustic energy beam.…”

Section: Introductionmentioning

confidence: 99%

The Focused Beam Forming with a Monolithic 2D Phased Array

Lila

Kapelewski

2008

Acta Phys. Pol. A

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A new type of the monolithic acoustic scanner based on a near-surface quasicomposite two-dimensional array, implemented in the solid elastic substrate was proposed. It provides a simple means of focusing and scanning a beam of acoustic waves, radiated into the depth of the elastic solid substrate. A chirped surface acoustic wave is converted into a focused bulk wave by scattering from an array composed of a 2D periodic system of regions with varying material parameters, located at the surface of a surface acoustic waves substrate. In the paper, a simple numerical simulation model is presented to analyse the influences of the dynamical and geometrical parameters of the surface structure, as well as the influences of incident surface acoustic waves signal profile on the focal distribution.

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Ion implanted substrates for SAW gas sensors*

Pasternak

Jasek

2005

J. Phys. IV France

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Surface acoustic waves in quasi-composite near-surface microstructured layers

Cited by 4 publications

References 4 publications

Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase

Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase

The Focused Beam Forming with a Monolithic 2D Phased Array

Ion implanted substrates for SAW gas sensors*

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