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Single-shot ultrabroadband two-dimensional electronic spectroscopy of the light-harvesting complex LH2

机译:捕光复合体LH2的单次超宽带二维电子光谱

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摘要

Here we present two-dimensional (2D) electronic spectra of the light-harvesting complex LH2 from purple bacteria using coherent pulses with bandwidth of over 100 nm FWHM. This broadband excitation and detection has allowed the simultaneous capture of both the B800 and B850 bands using a single light source. We demonstrate that one laser pulse is sufficient to capture the entire 2D electronic spectrum with a high signal-to-noise ratio. At a waiting time of 800 fs, we observe population transfer from the B800 to B850 band as manifested by a prominent cross peak. These results will enable observation of the dynamics of biological systems across both ultrafast (<1 ps) and slower (> 1 ms) timescales simultaneously.
机译:在这里,我们使用带宽超过100 nm FWHM的相干脉冲从紫色细菌中收集光的复合物LH2的二维(2D)电子光谱。这种宽带激发和检测功能允许使用单个光源同时捕获B800和B850频段。我们证明了一个激光脉冲足以捕获具有高信噪比的整个2D电子光谱。在800 fs的等待时间上,我们观察到人口从B800到B850频带的转移,这是由一个突出的交叉峰所表明的。这些结果将使您能够同时观察超快(<1 ps)和慢速(> 1 ms)时间范围内的生物系统动力学。

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