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Title: Photoacoustic Point Source

Abstract

We investigate the photoacoustic effect generated by heat deposition at a point in space in an inviscid fluid. Delta-function and long Gaussian optical pulses are used as sources in the wave equation for the displacement potential to determine the fluid motion. The linear sound-generation mechanism gives bipolar photoacoustic waves, whereas the nonlinear mechanism produces asymmetric tripolar waves. The salient features of the photoacoustic point source are that rapid heat deposition and nonlinear thermal expansion dominate the production of ultrasound.

Authors:
; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40205754
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 86; Journal Issue: 16; Other Information: DOI: 10.1103/PhysRevLett.86.3550; Othernumber: PRLTAO000086000016003550000001; 016115PRL; PBD: 16 Apr 2001; Journal ID: ISSN 0031-9007
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DELTA FUNCTION; DEPOSITION; PHOTOACOUSTIC EFFECT; POINT SOURCES; PRODUCTION; THERMAL EXPANSION; WAVE EQUATIONS

Citation Formats

Calasso, Irio G, Craig, Walter, and Diebold, Gerald J. Photoacoustic Point Source. United States: N. p., 2001. Web. doi:10.1103/PhysRevLett.86.3550.
Calasso, Irio G, Craig, Walter, & Diebold, Gerald J. Photoacoustic Point Source. United States. doi:10.1103/PhysRevLett.86.3550.
Calasso, Irio G, Craig, Walter, and Diebold, Gerald J. Mon . "Photoacoustic Point Source". United States. doi:10.1103/PhysRevLett.86.3550.
@article{osti_40205754,
title = {Photoacoustic Point Source},
author = {Calasso, Irio G and Craig, Walter and Diebold, Gerald J},
abstractNote = {We investigate the photoacoustic effect generated by heat deposition at a point in space in an inviscid fluid. Delta-function and long Gaussian optical pulses are used as sources in the wave equation for the displacement potential to determine the fluid motion. The linear sound-generation mechanism gives bipolar photoacoustic waves, whereas the nonlinear mechanism produces asymmetric tripolar waves. The salient features of the photoacoustic point source are that rapid heat deposition and nonlinear thermal expansion dominate the production of ultrasound.},
doi = {10.1103/PhysRevLett.86.3550},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 16,
volume = 86,
place = {United States},
year = {2001},
month = {4}
}