Department of Chemistry, University of Victoria, Victoria, British Columbia V8W 3V6, Canada.
J Chem Phys. 2012 Jul 7;137(1):014201. doi: 10.1063/1.4731282.
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.
我们提出了一种可见-近红外和频光谱技术，它能够在单一实验条件下同时确定样品响应的幅度和相位。在相位稳定性较高的情况下，例如在共线光束几何结构中，这一点尤为有价值，因为它可以在不重新测量本振相位或参考相位的情况下进行多次实验。在说明了这种几何结构可以实现的相位稳定性之后，我们提供了一种从单个二维光谱-时间干涉条纹确定幅度和相位的技术。我们对十八烷基三氯硅烷膜表面的 C-H 伸缩振动频率区域进行了完整的演示。
