Visualization of low-frequency liquid surface acoustic waves by means of optical diffraction

Miao, Runcai; Yang, Zongli; Zhu, Jingtao; Shen, Changyu
April 2002
Applied Physics Letters;4/29/2002, Vol. 80 Issue 17, p3033
Academic Journal
A technique for low-frequency liquid surface acoustic wave (LFLSAW) visualization is developed based on the light diffraction. The technique is capable of real-time characterization of wave amplitude, and it produces highly visible stationary diffraction pattern for a low-frequency wave (a few hundreds Hz). The disappearance of the zero-order diffraction fringe, which corresponding to the 100% diffraction efficiency, was experimentally observed for using this technique. The correlation of the diffraction pattern to the LFLSAW amplitude is also experimentally established. © 2002 American Institute of Physics.


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