Cavitation and acoustic emission around laser-heated microparticles

被引：130

作者：

Lin, CP ^{[1
]}

Kelly, MW ^{[1
]}

机构：

[1] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Wellman Labs Photomed, Boston, MA 02114 USA

来源：

APPLIED PHYSICS LETTERS | 1998年 / 72卷 / 22期

关键词：

D O I：

10.1063/1.121462

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied transient cavitation bubble formation and acoustic emission around individual laser-heated microparticles using subnanosecond time-resolved microscopy. Microcavitation babbles were observed as early as 0.5 ns after the particles were heated by a 30 ps laser pulse. The bubbles expanded to a few micrometers in size and collapsed on the time scale of 0.1-1 mu sec. We discuss microcavitation as the origin of anomalously large photoacoustic effects and nonlinear optical responses observed in laser-heated colloidal suspensions, as well as a mechanism for cellular damage in biologic tissue containing pigment particles. (C) 1995 American Institute of Physics.

引用

页码：2800 / 2802

页数：3

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