Photoacoustic doppler effect from flowing small light-absorbing particles
Photoacoustic doppler effect from flowing small light-absorbing particles
复制标题
DOI：
10.1103/physrevlett.99.184501
复制
发表时间：
2007-11-02
影响因子：
8.6
通讯作者：
Wang, Lihong V.
中科院分区：
文献类型：
--
作者：
Fang, Hui;Maslov, Konstantin;Wang, Lihong V.
从微米级碳颗粒悬浮液的流动中，观察到光声多普勒频移。正如理论上预测的那样，所观察到的多普勒频移等于多普勒超声中的多普勒频移的一半，并且不依赖于激光照射的方向。这一新的物理现象为发展光声多普勒血流仪提供了基础，该技术可用于检测光散射介质中的流体流动，特别是生物组织中较深微循环的低速血流。
From the flow of a suspension of micrometer-scale carbon particles, the photoacoustic Doppler shift is observed. As predicted theoretically, the observed Doppler shift equals half of that in Doppler ultrasound and does not depend on the direction of laser illumination. This new physical phenomenon provides a basis for developing photoacoustic Doppler flowmetry, which can potentially be used for detecting fluid flow in optically scattering media and especially low-speed blood flow of relatively deep microcirculation in biological tissue.