Femtosecond absorption and emission spectroscopy of the DCM laser dye
Femtosecond absorption and emission spectroscopy of the DCM laser dye
复制标题
DCM 激光染料的飞秒吸收和发射光谱
DOI：
10.1016/0167-7322(95)92824-u
复制
发表时间：
1995
影响因子：
6
通讯作者：
J. Mialocq
中科院分区：
文献类型：
--
作者：
S. Pommeret;T. Gustavsson;R. Naskrȩcki;G. Baldacchino;J. Mialocq
报道了用飞秒激光研究DCM苯乙烯基激光染料分子光物理和光化学性质的结果。飞秒泵浦探针实验（利用白光连续光谱和上转换荧光光谱的吸收/增益光谱）表明，由于溶剂笼在DCM的高极性荧光第一单重态激发态周围快速重组，其增益和发射光谱发生了红移，S1→sn吸收带发生了蓝移。本文首次对DCM的自发发射、增益和吸收进行了完整的研究，并在300 fs （FWHM）附近进行了泵浦-探针相互作用，证明了DCM从局部激发（LE）到扭曲分子内电荷转移（TICT）状态转变的假设是不成立的。
The results of a femtosecond laser investigation of the photophysical and photochemical properties of the DCM styryl laser dye molecule are reported. Femtosecond pump-probe experiments (absorption/gain spectroscopy using a white light continuum and up-conversion fluorescence spectroscopy) show a red shift of the gain and emission spectra and a blue shift of the S1→ SNabsorption band only due to a fast reorganization of the solvent cage around the highly polar fluorescent first singlet excited state of DCM. This first complete study (spontaneous emission, gain and absorption) of DCM with a pump-probe intercorrelation function around 300 fs (FWHM) demonstrates that the hypothesis of a transition from a locally excited (LE) to a twisted intramolecular charge transfer (TICT) state is not valid for DCM.