Bandwidth improvement of LiNbO3ultrasonic transducers by half-concaved inversion layer approach

J. Chen, J. Y. Dai, C. Zhang, Z. T. Zhang, G. P. Feng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)

Abstract

A novel type of half-concaved LiNbO3plate with domain inversion layer has been proposed for fabricating high-frequency broadband ultrasonic transducers. Two opposite ferroelectric polarization layers with a curved boundary are presented after heat treatment in the half-concaved LiNbO3plate with a total thickness of 110 μm. Characterization of the transducers illustrates that, without a matching layer, the self-focusing transducer with the half-concaved LiNbO3plate has achieved 123% bandwidth at the center frequency of 60 MHz, which is a significant improvement over the planar inversion layer transducer.
Original languageEnglish
Article number114903
JournalReview of Scientific Instruments
Volume83
Issue number11
DOIs
Publication statusPublished - 1 Nov 2012

ASJC Scopus subject areas

  • Instrumentation

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