Photoacoustic Point Source

Journal Article · Mon Apr 16 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.86.3550· OSTI ID:40205754

Calasso, Irio G; Craig, Walter; Diebold, Gerald J

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.

• Sponsoring Organization: (US)
• OSTI ID: 40205754
• Journal Information: Physical Review Letters, Vol. 86, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.86.3550; Othernumber: PRLTAO000086000016003550000001; 016115PRL; PBD: 16 Apr 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DELTA FUNCTION
DEPOSITION
PHOTOACOUSTIC EFFECT
POINT SOURCES
PRODUCTION
THERMAL EXPANSION
WAVE EQUATIONS