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首页> 外文期刊>Physica, B. Condensed Matter >Spectrally resolved two-colour three-pulse photon echo studies of vibrational dynamics of molecules
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Spectrally resolved two-colour three-pulse photon echo studies of vibrational dynamics of molecules

机译：分子振动动力学的光谱分辨二色三脉冲光子回波研究

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Spectrally resolved two-colour three-pulse photon echoes (PE) have been investigated on a femtosecond time scale for Rhodamine B in Methanol. The time evolution of the spectra of the PE signals and their dependence on the wavelength of the excitation pulses are analysed. New spectral features are observed which differ from the spectral profile of the probe pulse and which decay with a range of time constants. The influence of vibrational-electronic coupling on the PE spectra is discussed. The vibrational relaxation times (80-200 fs), which depend on the levels selected in the vibrational manifold, and the optical dephasing time (similar to400fs) can be determined directly from the spectrally resolved PE measurements. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 19]
机译：在飞秒时间内对甲醇中若丹明B的光谱分辨二色三脉冲光子回波（PE）进行了研究。分析了PE信号频谱的时间演化及其与激励脉冲波长的关系。观察到新的光谱特征，这些光谱特征不同于探针脉冲的光谱轮廓，并且随着时间常数的范围而衰减。讨论了振动电子耦合对PE光谱的影响。振动弛豫时间（80-200 fs）取决于振动歧管中选择的级别，而光学移相时间（类似于400fs）可以直接从光谱解析的PE测量中确定。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：19]

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