论文标题
细菌绿色A具有同步双模式激光器的二维电子光谱
Two-dimensional electronic spectroscopy of bacteriochlorophyll a with synchronized dual mode-locked lasers
论文作者
论文摘要
分子中的原子和电子在化学反应过程中如何移动，以及如何使用激光光闪烁研究向周围环境转移或从周围环境中转移的能量。然而，尽管长期努力开发了各种相干的光谱技术，但缺乏能够使用飞秒时间分辨率和纳秒松弛测量的无所不能的方法，这阻碍了研究相关电子动力学和功能材料和生物学系统中相关电子动力学和振动相关性的各种应用。在这里，我们证明了两个宽带（> 300 nm）同步模式锁定激光器可以实现二维电子光谱（2DES）研究，例如在凝聚相中的生物团（2DES）研究，例如凝结相的细菌氯地层A，以测量高分辨率的相结合振动光谱和纳米核心释放。因此，我们预计此处开发和演示的双模式基于激光的2DE将用于揭示轻度收获蛋白复合物和半导体材料中量子相干性与激子动力学之间的相关性。
How atoms and electrons in a molecule move during a chemical reaction and how rapidly energy is transferred to or from the surroundings can be studied with flashes of laser light. However, despite prolonged efforts to develop various coherent spectroscopic techniques, the lack of an all-encompassing method capable of both femtosecond time resolution and nanosecond relaxation measurement has hampered various applications of studying correlated electron dynamics and vibrational coherences in functional materials and biological systems. Here, we demonstrate that two broadband (>300 nm) synchronized mode-locked lasers enable two-dimensional electronic spectroscopy (2DES) study of chromophores such as bacteriochlorophyll a in condensed phases to measure both high-resolution coherent vibrational spectrum and nanosecond electronic relaxation. We thus anticipate that the dual mode-locked laser-based 2DES developed and demonstrated here would be of use for unveiling the correlation between the quantum coherence and exciton dynamics in light-harvesting protein complexes and semiconducting materials.
