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1. 新疆师范大学物理与电子工程学院, 新疆 乌鲁木齐 830054
2. 中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,湖北 武汉,430071
纸质出版日期:2017-5-5,
收稿日期:2016-11-7,
修回日期:2017-1-19,
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布玛丽亚·阿布力米提, 向梅. 飞秒时间分辨实验中泵浦-探测交叉相关函数的测量和时间零点的确定[J]. 发光学报, 2017,38(5): 648-654
Bumaliya·ABULIMITI, XIANG Mei. Determine The Pump-probe Cross Correlation Function and The Zero of Time of The Pump and Probe Laser in Femtosecond Time-resolved Studies[J]. Chinese Journal of Luminescence, 2017,38(5): 648-654
布玛丽亚·阿布力米提, 向梅. 飞秒时间分辨实验中泵浦-探测交叉相关函数的测量和时间零点的确定[J]. 发光学报, 2017,38(5): 648-654 DOI: 10.3788/fgxb20173805.0648.
Bumaliya·ABULIMITI, XIANG Mei. Determine The Pump-probe Cross Correlation Function and The Zero of Time of The Pump and Probe Laser in Femtosecond Time-resolved Studies[J]. Chinese Journal of Luminescence, 2017,38(5): 648-654 DOI: 10.3788/fgxb20173805.0648.
飞秒激光技术的出现使得实时探测与跟踪激发态超快弛豫动力学过程成为可能,并能够给出激发态动力学过程清晰的物理图像。而在飞秒时间分辨实验中,泵浦-探测相关函数和时间零点直接影响实验结果的可靠性和准确性。本文结合飞秒激光在分子激发态超快动力学过程中的应用进展,介绍了根据实验条件和要求,在具体实验过程中泵浦-探测相关函数测量和时间零点确定的几种方法。实验中选择可见光作为泵浦光和探测光时,可以通过测定随泵浦-探测时间延迟变化的泵浦激光与探测激光的和频/差频光强来确定泵浦探测交叉相关函数和时间零点;而选择中心波长在紫外甚至真空紫外的激光脉冲作为泵浦光或探测光时,泵浦-探测交叉相关函数通常采用校正的方法测量。
Femtosecond laser technique
not only makes the observation of excited state relaxation processes more directly
but also offers information for disentangle the complex dynamics of excited state relaxation processes. However
what have an explosive impact on accuracy and reliability of experimental result is that cross correlation function as well as the zero of time of the pump and probe laser pulses
therefore
determine the correct value of them is the most vital process in the experiment. Examples of applying the femtosecond pump-probe technique is presented to study the relaxation dynamics of the molecular excited states
by what
on the basis of experimental conditions and requirements
the paper introduced approaches of determine the cross correlation function as well as the zero of time of the pump and probe laser pulse in the course of concrete femtosecond time-resolved experiments. For the pump and the probe laser pulses in the visible light range
by way of delay time of the pump and the probe pulses
we could apply optical technique to detect the transient of the intensity of the second harmonic generation. Yet
for the determination of correlation function as well as the zero of time for the ultrafast pulses in the UV or the VUV
calibration method would be an ideal method.
飞秒激光泵浦-探测相关函数时间分辨
femtosecond laserpump-probecross-correlation functiontime-resolved
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