气相相干多维光谱
Coherent multidimensional spectroscopy in the gas phase
摘要：
本文综述了近年来在气相稀样品中应用多维相干电子光谱的研究工作。具有改进灵敏度的精细相循环方法的发展为探测甚至稀释的气相样品开辟了新的机会。在这种情况下，在掺杂的氦液滴进行的二维光谱的第一个结果揭示了冷，弱结合的分子的电子激发后的飞秒动力学，甚至从与氦环境的相互作用的诱导动力学。这样的实验，在低温下提供明确的条件下，有可能使隔离的基本过程中的激发和电荷转移动力学的分子结构，迄今已被掩盖在复杂的散装环境。
英文摘要：
Recent work applying multidimentional coherent electronic spectroscopy at dilute samples in the gas phase is reviewed. The development of refined phase-cycling approaches with improved sensitivity has opened-up new opportunities to probe even dilute gas-phase samples. In this context, first results of 2-dimensional spectroscopy performed at doped helium droplets reveal the femtosecond dynamics upon electronic excitation of cold, weakly-bound molecules, and even the induced dynamics from the interaction with the helium environment. Such experiments, offering well-defined conditions at low temperatures, are potentially enabling the isolation of fundamental processes in the excitation and charge transfer dynamics of molecular structures which so far have been masked in complex bulk environments.
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