Coherent Laser Control of Molecular Reaction Dynamics (Physics)

建议利用激光的相干特性 光束来控制光解产物的分布 的小分子。 该方法依赖于Shapiro的理论 Brumer认为，产品状态分布完全由 由简并叠加态的相位激发， 激光，因此控制相位控制产品 分支比 提出了实现相位控制的方法， 通过使用两个光路来激发激发态 状态，两者之间具有明确的相位差 光脉冲，对应于单个光的吸收， 三张照片。 该方法将应用于竞争 在自电离和光解离之间， 同位素标记分子的光解离， 产生同位素可区分的中性碎片。 振荡是产物分支比作为相对相位 这两个激光束的扫描将提供相干性的证明 激光控制

It is proposed to use the coherence properties of a laser beam to control the product distribution in the photodissociation of small molecules. The approach relies on the theory of Shapiro and Brumer that product state distribution is determined entirely by the phase of the degenerate superposition state excited by the laser, so that controlling the phase controls the product branching ratio. It is proposed to achieve phase control of the excited state by using two optical paths to excite the same state, with a well defined phase difference between the two optical pulses, corresponding to absorption of a single photo or three photos. The approach will be applied to the competition between autoionization and photo dissociation, and also to the photo dissociation of an isotopically labelled molecule to produce isotopically distinguishable neutral fragments. Oscillations is product branching ratios as the relative phases of the two laser beams is scanned will provide proof of coherent laser control.