Numerical simulation of enhanced photoacoustic generation and wavefront shaping by a distributed laser array

Hou, R., Xu, B., Xia, Z., Zhang, Y., Liu, W., Glorieux, C., Marsh, J. H. , Hou, L. , Liu, X. and Xiong, J. (2021) Numerical simulation of enhanced photoacoustic generation and wavefront shaping by a distributed laser array. Applied Sciences, 11(20), 9497. (doi: 10.3390/app11209497)

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Abstract

In photoacoustic imaging, the use of arrayed laser sources brings several advantages. Acoustic waves can be generated with flexible control of wavefronts, bringing functionality such as ultrasonic beam steering and focusing. The use of arrays reduces the optical intensity while increasing the strength of the ultrasonic wave, bringing the advantages of improved signal-to-noise ratio (SNR) while avoiding laser-induced damage. In this paper, we report a numerical model for studying the generation and shaping of acoustic wavefronts with laser arrays. The propagation of mechanical waves, photoacoustically generated by thermal expansion, is simulated and discussed in detail. In addition, a partially delayed distributed array is studied both theoretically and quantitatively. The developed model for wavefront control through time-delayed laser pulses is shown to be highly suited for the optimization of laser array generation schemes.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Hou, Dr Lianping and Marsh, Professor John
Creator Roles:
Marsh, J. H.Conceptualization
Hou, L.Conceptualization
Authors: Hou, R., Xu, B., Xia, Z., Zhang, Y., Liu, W., Glorieux, C., Marsh, J. H., Hou, L., Liu, X., and Xiong, J.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Applied Sciences
Publisher:MDPI
ISSN:2076-3417
ISSN (Online):2076-3417
Published Online:13 October 2021
Copyright Holders:Copyright © 2021 by the authors
First Published:First published in Applied Sciences 11(20):9497
Publisher Policy:Reproduced under a Creative Commons Licence

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
302617Optically controlled THz phased array antennasJohn MarshEngineering and Physical Sciences Research Council (EPSRC)EP/R042578/1ENG - Electronics & Nanoscale Engineering