Theoretical and experimental study of plate acoustic waves in ZX-cut lithium niobate

Klymko, V.; Nadtochiy, Andriy; Ostrovskii, I. V.

doi:10.1109/tuffc.2008.989

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…The coefficients K are different due to dispersion properties of the guided zero mode in the ZX-cut lithium niobate wafer. 29 The electromechanical quality factors Q are also slightly different because of wafers micromachining with two different multidomain structure periods (2d), 0.60 mm in Fig. 4 and 0.9 mm in Fig.…”

Section: Analytical Calculation Of Acoustic Amplitudementioning

confidence: 99%

Split-mode ultrasonic transducer

Ostrovskii

Cremaldi

2013

The Journal of the Acoustical Society of America

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A split-mode ultrasonic transducer is investigated in both theory and experiment. This transducer is a two-dimensional structure of periodically poled domains in a ferroelectric wafer with free surfaces. The acoustic vibrations are excited by a radio frequency electric current applied along the length of the wafer, which allows the basal-plane surfaces to be free of metal coatings and thus ready for further biomedical applications. A specific physical property of this transducer consists of the multiple acousto-electric resonances, which occur due to an acoustic mode split when the acoustic half-wavelength is equal to the domain length. Possible applications include ultrasonic generation and detection at the micro-scale, intravascular sonification and visualization, ultrasound therapy of localized small areas such as the eye, biomedical applications for cell cultures, and traditional nondestructive testing including bones and tissues. A potential use of a non-metallized wafer is a therapeutic application with double action that is both ultrasound itself and an electric field over the wafer. The experimental measurements and theoretical calculations are in good agreement.

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Section: Analytical Calculation Of Acoustic Amplitudementioning

confidence: 99%

Split-mode ultrasonic transducer

Ostrovskii

Cremaldi

2013

The Journal of the Acoustical Society of America

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Resonances in ferroelectric phononic superlattice

Ostrovskii

Cremaldi

2012

Applied Physics Letters

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The periodically poled ferroelectric wafer is a two-dimensional phononic superlattice. The important applications of such a solid include ultrasonic transducers at the micro/nano-scale for low intensity ultra-sonography, ferroelectric data storage, and development of very high frequency chips for next generation communication and information technologies, and others. In this work, we show theoretically and experimentally that a ferroelectric phononic superlattice has two distinctive resonances in acousto-electric transformation. They are associated with a split acoustic mode at the boundary between the first and second acoustic Brillouin zone.

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