Examination of surface acoustic wave reflections by observing acoustoelectric current generation under pulse modulation
Examination of surface acoustic wave reflections by observing acoustoelectric current generation under pulse modulation
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DOI：
10.1063/1.2355444
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发表时间：
2006-09-25
影响因子：
4
通讯作者：
Pepper, M.
中科院分区：
文献类型：
--
作者：
Astley, M. R.;Kataoka, M.;Pepper, M.
利用声电流的频率依赖性研究了声表面波在一维通道中的反射。通过脉冲调制的换能器功率与短脉冲宽度（0.2 μ s）和匹配的脉冲重复周期的延迟时间的一个特定的反射路径，作者检测个别反射SAW波包。傅里叶变换结果表明，从传感器后面的样品边缘的反射和布拉格反射从第二个传感器具有最强的效果。这些的反射功率系数估计分别约为0.29和约为0.99。(c)2006年，美国物理学会。
The authors investigate surface acoustic wave (SAW) reflections using the frequency dependence of the acoustoelectric current through a one-dimensional channel. By pulse modulating the transducer power with a short pulse width (0.2 mu s) and matching the pulse repetition period to the delay time of a specific reflection path, the authors detect individual reflected SAW wave packets. Fourier transform results show that reflections from the sample edge behind the transducer and Bragg reflections from the second transducer have the strongest effects. The reflection power coefficients for these are estimated to be approximate to 0.29 and approximate to 0.99, respectively. (c) 2006 American Institute of Physics.