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首页> 外文期刊>Optics Letters >Frequency shifts and lifetime changes of sodium atoms near rough metal surfaces
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Frequency shifts and lifetime changes of sodium atoms near rough metal surfaces

机译：粗糙金属表面附近钠原子的频移和寿命变化

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Two-photon laser-induced fluorescence measurements of transition frequencies and lifetimes of laser-excited Na atoms are presented as a function of distance (2-3 nm) to metal surfaces of different roughness. We characterized the surface roughness by fitting a Gaussian height-height correlation function to force microscopic data. An unusually small red shift of the Na transition frequency of a few hundred megahertz was observed. In the framework of a quantum-mechanical linear optical response formalism we fitted the lifetime and the frequency shift data simultaneously to obtain effective parameters of a selvedge dielectric function. In that way we are able to take into account both surface roughness and nonlocality, which in turn result in the observed small frequency shifts. (C) 1997 Optical Society of America.
机译：给出了两个光子激光诱导的跃迁频率和激光激发的Na原子寿命的荧光测量值，该测量值是距离不同粗糙度金属表面的距离（2-3 nm）的函数。我们通过拟合高斯高度-高度相关函数来强制显微数据来表征表面粗糙度。观察到Na跃迁频率有几百兆赫兹的异常小红移。在量子力学线性光学响应形式的框架中，我们同时拟合了寿命和频移数据，以获得边缘介电函数的有效参数。这样，我们既可以考虑表面粗糙度，又可以考虑非局部性，从而可以观察到较小的频移。 （C）1997年美国眼镜学会。

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