Photoacoustic point source

被引：146

作者：

Calasso, IG ^{[1
]}

Craig, W

Diebold, GJ

机构：

[1] Brown Univ, Dept Chem, Providence, RI 02912 USA

[2] Brown Univ, Dept Math, Providence, RI 02912 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 16期

关键词：

Delta function - Gaussian optical pulses - Heat deposition - Linear sound generation mechanism;

D O I：

10.1103/PhysRevLett.86.3550

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：3550 / 3553

页数：4

共 18 条

[1]

[Anonymous], 1998, HDB MATH

[2]

[Anonymous], LASER OPTOACOUSTICS

[3]

BURMISTROVA LV, 1979, SOV PHYS ACOUST+, V25, P348

[4] CHEMICAL GENERATION OF ACOUSTIC-WAVES - A GIANT PHOTOACOUSTIC EFFECT [J].