Waveform Synthesis of Attosecond Optical Pulses: A Common Route to Attosecond Pump-Probe Spectroscopy and Nanoscopy in Aqueous Solution

阿秒光脉冲的波形合成：水溶液中阿秒泵浦探针光谱学和纳米显微镜学的共同途径

• 批准号: RGPIN-2015-06208
• 负责人: BeaudoinBertrand, Julien
• 金额: $ 2.4万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=633164
• 关键词: Waveform; Synthesis; Attosecond; Optical; Pulses

When a molecule absorbs light, its electronic cloud reacts almost instantaneously followed by rovibrational nuclear dynamics on the femtosecond (fs=10-15s.) to picosecond (ps=10-12s.) timescale. In photosynthesis, for example, the absorption of ultraviolet light by chlorophyll molecules induces an electronic dipole oscillation, which has a period in the range of 1 fs, followed by its slower decay and energy redistribution to the nuclear degrees of freedom. Over the last decades, time-resolved spectroscopy showed how few-cycle femtosecond laser pulses can be used to steer nuclear wave packets and control the outcome of elementary reactions. The lack of shorter pulses, however, has left control of the electron wave packets on the sub-oscillation period timescale unexplored. Would it be possible to follow and, ultimately, more efficiently control reaction dynamics right from the earliest moments when electron dipole forces initiate nuclear motion?

当一个分子吸收光时，其电子云几乎立即反应，然后在飞秒上（FS = 10-15。）上进行反振动核动力学，以对picsecond（PS = 10-12s。）时间表。在光合作用中，例如，叶绿素分子对紫外线的吸收会诱导电子偶极振荡，该电子偶极振荡的周期在1 FS范围内，然后其较慢的衰变和能量再分配到核学位。在过去的几十年中，时间分辨光谱显示了很少有周期的飞秒激光脉冲可以用来指导核波包数据包并控制基本反应的结果。然而，缺乏较短的脉冲在未探索的亚振荡期限内的电子波数据包中控制了电子波数据包。从电子偶极力启动核运动的最早时刻起，是否可以遵循并最终更有效地控制反应动力学？