Barge Vishal J, Hu Zhan, Willig Joyce, Gordon Robert J
Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60680-7061, USA.
Phys Rev Lett. 2006 Dec 31;97(26):263001. doi: 10.1103/PhysRevLett.97.263001. Epub 2006 Dec 29.
We demonstrate theoretically and experimentally that the Gouy phase of a focused laser beam may be used to control the photoinduced reactions of a polyatomic molecule. Quantum mechanical interference between one- and three-photon excitation of vinyl chloride produces a small phase lag between the dissociation and ionization channels on the axis of the molecular beam. Away from the axis, the Gouy phase introduces a much larger phase lag that agrees quantitatively with theory without any adjustable parameters.
我们通过理论和实验证明，聚焦激光束的古依相位可用于控制多原子分子的光致反应。氯乙烯单光子和三光子激发之间的量子力学干涉在分子束轴上的解离和电离通道之间产生一个小的相位滞后。在远离轴的地方，古依相位引入了一个大得多的相位滞后，这与理论在没有任何可调参数的情况下定量相符。
