Che S, Guduru P R, Nurmikko A V, Maris H J
Department of Physics, Brown University, Providence, RI 02912, United States.
School of Engineering, Brown University, Providence, RI 02912, United States.
Ultrasonics. 2015 Feb;56:153-9. doi: 10.1016/j.ultras.2014.02.010. Epub 2014 Feb 28.
We report on the development of a new type of scanning acoustic microscope. We use a femtosecond light pulse to generate a short sound pulse, and then focus this sound onto the sample by means of a specially designed and microfabricated acoustic lens of radius a few microns. The sound travels to the sample through a thin layer of water. The sound reflected from the sample is collected by the lens and then passes through a monolithically integrated optical resonant cavity. The induced change in the properties of this cavity are measured using a time-delayed probe light pulse. We describe some of the challenges involved in the construction and operation of this high-precision metrology apparatus and present some preliminary results.
我们报告了一种新型扫描声学显微镜的研制情况。我们使用飞秒光脉冲来产生短声脉冲，然后通过一个半径为几微米的经过特殊设计和微加工的声学透镜将此声音聚焦到样品上。声音通过一薄层水传播到样品。从样品反射的声音由透镜收集，然后通过一个单片集成光学谐振腔。使用延时探测光脉冲来测量该谐振腔特性的感应变化。我们描述了这种高精度计量仪器在构建和操作中涉及的一些挑战，并展示了一些初步结果。
