Simultaneous measurement of magnitude and phase in interferometric sum-frequency vibrational spectroscopy.
Simultaneous measurement of magnitude and phase in interferometric sum-frequency vibrational spectroscopy.
复制标题
干涉和频振动光谱中幅度和相位的同步测量。
DOI：
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发表时间：
2012
影响因子：
4.4
通讯作者：
Dennis K. Hore
中科院分区：
文献类型：
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作者：
P. Covert;William R. FitzGerald;Dennis K. Hore
我们提出了一种可见红外和频光谱技术，能够根据一组实验条件同时确定样品响应的幅度和相位。这在相位稳定性高的情况下尤其有价值，例如在共线光束几何形状中，因为它使得能够执行多个实验而无需重新测量本地振荡器相位或参考相位。在说明了用这种几何形状可实现的相位稳定性之后，我们提供了一种从一组二维谱时干涉条纹定量确定幅度和相位的技术。提供了十八烷基三氯硅烷薄膜表面的 C-H 拉伸频率区域的完整演示。
We present a visible-infrared sum-frequency spectroscopic technique that is capable of simultaneously determining the magnitude and phase of the sample response from a single set of experimental conditions. This is especially valuable in cases where the phase stability is high, as in collinear beam geometries, as it enables multiple experiments to be performed without re-measuring the local oscillator phase or the reference phase. After illustrating the phase stability achievable with such a geometry, we provide a technique for quantitatively determining the magnitude and phase from a single set of two-dimensional spectral-temporal interference fringes. A complete demonstration is provided for the C-H stretching frequency region at the surface of an octadecyltricholosilane film.