Trushkevych, Oksana, Eriksson, Tobias J. R., Ramadas, Sivaram Nishal, Dixon, Steve M. and Edwards, R. S. (Rachel S.) (2015) Ultrasound sensing using the acousto-optic effect in polymer dispersed liquid crystals. Applied physics letters, 107 (5). 054102 . doi:10.1063/1.4928390

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Abstract

Acousto-optic effects are demonstrated in polymer dispersed liquid crystal (PDLC) films, showing promise for applications in ultrasound sensing. The PDLC films are used to image two displacement profiles of an air-coupled flexural transducers resonant modes at 295 kHz and 730 kHz. Results are confirmed using laser vibrometry. The regions on the transducers with the largest displacements are clearly imaged by the PDLC films, with the resolution agreeing well with laser vibrometry scanning. Imaging takes significantly less time than a scanning system (switching time of a few seconds, as compared to 8 hours for laser vibrometry). Heating effects are carefully monitored using thermal imaging, and are found not to be the main cause of PDLC clearing.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Polymer liquid crystals, Acoustooptics, Ultrasonic imaging
Journal or Publication Title:	Applied physics letters
Publisher:	American Institute of Physics
ISSN:	0003-6951
Official Date:	6 August 2015
Dates:	Date Event 6 August 2015 Available 29 July 2015 Accepted 3 July 2015 Submitted
Volume:	107
Number:	5
Article Number:	054102
DOI:	10.1063/1.4928390
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	University of Warwick, Merck & Co.

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