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首页> 外文期刊>Optics Letters >Two-photon spectroscopy and analysis with a white-light continuum probe
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Two-photon spectroscopy and analysis with a white-light continuum probe

机译：双光子光谱和白光连续谱探针分析

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摘要

We present a powerful experimental tool and analysis for characterization of two-photon absorption (2PA) spectra. We demonstrate this method with ZnS and then apply it to organic dyes in solution. We also compare the results with those from other methods such as two-photon fluorescence spectroscopy. This femtosecond pump-probe method uses a white-light continuum (WLC) as the probe to produce a nondegenerate 2PA spectrum. The extreme chirp of the WLC requires that transmittance data be collected over a range of temporal delays between pump and probe pulses. These data then need to be corrected for the effects of this chirp as well as for the temporal walk-off of the pulses in the sample that result from the frequency nondegenerate nature of the experiment. We present a simple analytic solution for the transmitted fluence through the sample, which is applicable for most practical cases.
机译：我们提供了功能强大的实验工具和双光子吸收（2PA）光谱表征分析。我们用ZnS演示了此方法，然后将其应用于溶液中的有机染料。我们还将结果与其他方法（如双光子荧光光谱法）的结果进行比较。这种飞秒泵浦探测方法使用白光连续体（WLC）作为探测器来产生不退化的2PA光谱。 WLC的极端chi声要求在泵浦脉冲和探测脉冲之间的一定时间延迟范围内收集透射率数据。然后，需要针对这些chi的影响以及由于实验的频率非简并性质而导致的样品中脉冲的时间偏移校正这些数据。我们为通过样本传递的通量提出了一种简单的解析解决方案，适用于大多数实际情况。

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