A Device for acoustic pulse echo experiments in the subterahertz range
A Device for acoustic pulse echo experiments in the subterahertz range
复制标题
太赫兹范围内的声脉冲回波实验装置
DOI：
10.1103/physrevb.95.014304
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发表时间：
2017
影响因子：
3.7
通讯作者：
A. Lemaître
中科院分区：
文献类型：
--
作者：
R. Legrand;A. Huynh;S. Vincent;B. Perrin;A. Lemaître
我们目前的实验结果的光到声转换的超晶格嵌入在一个光学微腔，使用皮秒超声。在低温下进行了在0.3和0.6 THz产生和检测声子的能力的实验。最后，我们证明，这样的设备可以检测到的声突发，它已经产生，并已通过基板传播，被反射在基板的背面，并已返回到设备。我们研究了这种检测的效率，通过独立地改变泵浦和探测的激光波长，通过异步光学采样。
We present experimental results on the light-to-sound transduction by a superlattice embedded in an optical microcavity, using picosecond ultrasonics. Experiments on the ability to generate and detect phonons at 0.3 and 0.6 THz were performed at low temperature. Finally, we demonstrate that such a device can detect the acoustic burst that it has generated and which has propagated through the substrate, been reflected on the backside of the substrate and has returned to the device. We study the efficiency of this detection by varying independently the laser wavelength of the pump and probe, by means of asynchronous optical sampling.