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Excitation spectroscopy on single molecules in solids at low temperatures

机译：低温下固体中单分子的激发光谱

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Abstract: By severely reducing the number of solute molecules in the illuminated sample, the optical resonances of individual molecules can be resolved in a fluorescence excitation spectrum. Single molecule lines can be studied as a function of time and temperature: sudden jumps of their resonance frequencies are due to spectral diffusion processes. The signal from a single molecule displays specific correlations which makes time-resolved studies possible. Here, emphasis is put on photon-bunching arising from intersystem crossing (ISC). ISC rates are deduced from the observed decay rates of the correlation and are found to differ from molecule to molecule. A single molecule is a truly local probe of its environment by means of which fundamental studies of the matrix dynamics as well as nanophysics experiments may be undertaken.!18
机译：摘要：通过大大减少照射样品中的溶质分子数量，可以在荧光激发光谱中解析单个分子的光学共振。可以将单分子线作为时间和温度的函数进行研究：其共振频率的突然跳跃是由于光谱扩散过程引起的。来自单个分子的信号显示出特定的相关性，这使得时间分辨研究成为可能。这里，重点放在由系统间交叉（ISC）引起的光子聚集上。 ISC率是从观察到的相关性衰减率推导出来的，发现分子间的差异。单个分子是对其环境的真正本地探针，通过它可以进行基质动力学的基础研究以及纳米物理学实验。18

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