Laser-induced transient grating setup with continuously tunable period.
Laser-induced transient grating setup with continuously tunable period.
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DOI：
10.1063/1.4936767
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
A. Vega-Flick;A. Vega-Flick;Jeffrey K. Eliason;A. Maznev;A. Khanolkar;M. A. Ghanem;N. Boechler;J. J. Alvarado-Gil-J.;K. A. Nelson
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文献类型：
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作者：
A. Vega-Flick;A. Vega-Flick;Jeffrey K. Eliason;A. Maznev;A. Khanolkar;M. A. Ghanem;N. Boechler;J. J. Alvarado-Gil-J.;K. A. Nelson
我们提出了一种改进的激光诱导的瞬变光栅设置，使得能够连续地调谐瞬变光栅周期。周期的精细控制是通过改变用于分离激发光束和探测光束的衍射光栅的角度来实现的。通过测量体声波和表面声波在传输和反射几何形状上的色散，对该装置进行了测试。所提出的改进方案与光外差检测完全兼容，并且可以很容易地在任何瞬变光栅装置中实现。
We present a modification of the laser-induced transient grating setup enabling continuous tuning of the transient grating period. The fine control of the period is accomplished by varying the angle of the diffraction grating used to split excitation and probe beams. The setup has been tested by measuring dispersion of bulk and surface acoustic waves in both transmission and reflection geometries. The presented modification is fully compatible with optical heterodyne detection and can be easily implemented in any transient grating setup.