论文标题
通过频率分辨的二维电子光谱：用少于10-FS可见激光脉冲的人造荧光蛋白中的振动相干
Beat-frequency-resolved two-dimensional electronic spectroscopy: disentangling vibrational coherences in artificial fluorescent proteins with sub-10-fs visible laser pulses
论文作者
论文摘要
我们使用高速和稳定的2D电子光谱仪和少量周期可见的激光脉冲来对二维电子光谱进行频率分辨分析，以在人工荧光蛋白中解散振动相干性。我们开发了一种高度稳定的超短光源，该光源可在气体电池中使用多板脉冲压缩和激光丝产生5.3-FS可见脉冲，脉冲能量为4.7 UJ，重复速率为10 kHz。高度5.3-FS激光脉冲以及高速多通道检测器使我们能够测量一系列的2D电子光谱，这些光谱是根据与振动相干性相关的节拍频率解决的。我们成功地提取了吸收光谱中不均匀宽扩大后面的离散振动峰，并在典型的2D电子光谱中强的固定信号背后的激发电子状态的振动量子拍打。
We perform a beat-frequency-resolved analysis for two-dimensional electronic spectroscopy using a high-speed and stable 2D electronic spectrometer and few-cycle visible laser pulses to disentangle the vibrational coherences in an artificial fluorescent protein. We develop a highly stable ultrashort light source that generates 5.3-fs visible pulses with a pulse energy of 4.7 uJ at a repetition rate of 10 kHz using multi-plate pulse compression and laser filamentation in a gas cell. The above-5.3-fs laser pulses together with a high-speed multichannel detector enable us to measure a series of 2D electronic spectra, which are resolved in terms of beat frequency related to vibrational coherence. We successfully extract the discrete vibrational peaks behind the inhomogeneous broadening in the absorption spectra and the vibrational quantum beats of the excited electronic state behind the strong stationary signal in the typical 2D electronic spectra.
