Bandwidth improvement of LiNbO3 ultrasonic transducers by half-concaved inversion layer approach.

Abstract

A novel type of half-concaved LiNbO(3) plate 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 LiNbO(3) plate 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 LiNbO(3) plate has achieved 123% bandwidth at the center frequency of 60 MHz, which is a significant improvement over the planar inversion layer transducer.

DOI: 10.1063/1.4766822

7 Figures and Tables

Cite this paper

@article{Chen2012BandwidthIO, title={Bandwidth improvement of LiNbO3 ultrasonic transducers by half-concaved inversion layer approach.}, author={J Chen and Ji Dai and Cheng Zhang and Z T Zhang and Guang Feng}, journal={The Review of scientific instruments}, year={2012}, volume={83 11}, pages={114903} }