Fast hypersonic velocity measurement by Brillouin scattering from induced phonons
Fast hypersonic velocity measurement by Brillouin scattering from induced phonons
复制标题
通过感应声子的布里渊散射进行快速高超声速测量
DOI：
10.1109/ultsym.2012.0546
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Matsukawa
中科院分区：
文献类型：
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作者：
T. Sugimoto;T. Yanagitani;S. Takayanagi;M. Matsukawa
布里渊散射法是一种非接触、非破坏性的测量局部纵、横波声速的方法。然而，对热声子弱散射的测量导致测量精度较低，测量时间较长。为了克服这个问题，开发了一种人工诱导声学声子的技术，使用多晶ZnO薄膜，用同轴谐振器施加电场。在这项研究中，我们观察到布里渊散射诱导纵向声子从氧化锌薄膜沉积在一个板样品的后表面。研究了同轴谐振腔中感生声学声子强度与输入微波功率的关系。研究了光入射角对光场分布的影响。
Brillouin scattering method is a nondestructive and noncontact technique to measure local longitudinal and shear acoustic velocities in the GHz range. However, the measurements of weak scattering from thermal phonons result in the lower measurement accuracy and longer measurement time. To overcome this problem, a technique with artificially induced acoustic phonons was developed using a polycrystalline ZnO film, with a coaxial resonator to apply electric field. In this study, we observed Brillouin scattering by induced longitudinal phonons from ZnO film deposited on the rear surface of a plate sample. We investigated the relationship between the intensity of induced acoustic phonons and the input microwave power of a coaxial resonator. The effect of incident angle of light was also investigated.