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Your search keyword '"Jerez-Hanckes, Carlos F."' showing total 4 results
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4 results on '"Jerez-Hanckes, Carlos F."'

1. Annular interdigital transducer focuses piezoelectric surface waves to a single point

Author

Laude, Vincent, Gérard, Davy, Khelfaoui, Naima, Jerez-Hanckes, Carlos F., Benchabane, Sarah, and Khelif, Abdelkrim

Subjects
Condensed Matter - Materials Science
Abstract

We propose and demonstrate experimentally the concept of the annular interdigital transducer that focuses acoustic waves on the surface of a piezoelectric material to a single, diffraction-limited, spot. The shape of the transducing fingers follows the wave surface. Experiments conducted on lithium niobate substrates evidence that the generated surface waves converge to the center of the transducer, producing a spot that shows a large concentration of acoustic energy. This concept is of practical significance to design new intense microacoustic sources, for instance for enhanced acouto-optical interactions.

Published
2007
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2. 3-D electrostatic hybrid element model for SAW interdigital transducers

Author

Jerez-Hanckes, Carlos F., Laude, Vincent, Nedelec, Jean-Claude, and Lardat, Raphael

Subjects
Electrostatic interactions -- Analysis, Transducers -- Design and construction, Transducers -- Electric properties, Ultrasonics -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

An investigation is made regarding the singular behavior of charges at corner and edges on the metallized areas in SAW transducers. Results obtained from isotropic and anisotropic substrates for non-periodic configurations show that a tensor product of the of the Tchebychev bases overestimates the singularities at corners and thus cannot be used in a proper boundary element method formulation.

Published
2008

3. Surface greens' function of a piezoelectric half-space

Author

Laude, Vincent, Jerez-Hanckes, Carlos F., and Ballandras, Sylvain

Subjects
Wave equation -- Usage, Acoustic surface waves -- Research, Anisotropy -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

The computation of the two-dimensional harmonic spatial-domain Green's function at the surface of a piezoelectric half-space is discussed. It is found that the surface acoustic wave contributions give rise to an anisotropic generalization of the Hankel function H (super 2)(sub 0), the spatial Green's function for the scalar two-dimensional wave equation.

Published
2006

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