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首页> 外文期刊>Laser physics letters >Appearance of coherent artifact signals in femtosecond transient absorption spectroscopy in dependence on detector design
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Appearance of coherent artifact signals in femtosecond transient absorption spectroscopy in dependence on detector design

机译：飞秒瞬态吸收光谱中相干伪像信号的出现取决于探测器的设计

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摘要

The appearance of coherent artifact signals in transient absorption spectroscopy employing a spectrally integrated detection system is studied. The influence of the detection design on the shape of the observed signal is detailed and the experimentally very important case, in which the shape of the coherent artifact is strongly influenced by the presence of the sample itself, is considered - leading to the situation that the artifact signal cannot be accounted for by simple comparison of the kinetics obtained for the solvent only. Finally, an estimate of the relative contribution of the artifact to the overall transient absorption changes is presented facilitating the interpretation of short time transients in the presence of artifact contributions and allowing to estimate the excited state absorption cross-section for a known pump-intensity dependence of the artifact signal.
机译：研究了在采用光谱集成检测系统的瞬态吸收光谱中相干伪像信号的出现。详细介绍了检测设计对所观察信号形状的影响，并在实验上非常重要的情况下进行了考虑，其中相干伪像的形状受到样本本身的存在的强烈影响，从而导致以下情况：不能仅通过简单比较溶剂获得的动力学来解释人工信号。最后，提出了假象对整体瞬态吸收变化的相对贡献的估计，这有助于在存在假象影响的情况下解释短时瞬变，并允许根据已知的泵浦强度依赖性来估计激发态吸收截面。伪影信号。

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