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arXiv 1401.5344physics.optics
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声表面波的全息成像

Holographic imaging of surface acoustic waves

Francois Bruno, Jérôme Laurent, Daniel Royer, Michael Atlan

摘要:

我们报告的实验演示表面声波监测薄金属板上的外差光学全息。利用频率可调的时间平均激光多普勒全息成像方案,在传感器阵列上实现了局部光程调制的窄带成像。该方法能够在射频下对纳米振幅的面外振动进行鲁棒和定量映射。

英文摘要:

We report on an experimental demonstration of surface acoustic waves monitoring on a thin metal plate with heterodyne optical holography. Narrowband imaging of local optical pathlength modulation is achieved with a frequency-tunable time-averaged laser Doppler holographic imaging scheme on a sensor array, at video-rate. This method enables robust and quantitative mapping of out-of-plane vibrations of nanometric amplitudes at radiofrequencies.

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