Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany.
Phys Chem Chem Phys. 2011 May 21;13(19):8653-8. doi: 10.1039/c0cp02743j. Epub 2011 Apr 8.
Strong few-cycle light fields with stable electric field waveforms allow controlling electrons on time scales down to the attosecond domain. We have studied the dissociative ionization of randomly oriented DCl in 5 fs light fields at 720 nm in the tunneling regime. Momentum distributions of D(+) and Cl(+) fragments were recorded via velocity-map imaging. A waveform-dependent anti-correlated directional emission of D(+) and Cl(+) fragments is observed. Comparison of our results with calculations indicates that tailoring of the light field via the carrier envelope phase permits the control over the orientation of DCl(+) and in turn the directional emission of charged fragments upon the breakup of the molecular ion.
强的少周期光场具有稳定的电场波形，可以在阿秒域内控制电子。我们在隧穿区研究了在 720nm 的 5fs 光场中随机取向的 DCl 的离解电离。通过速度映射成像记录了 D(+)和 Cl(+)碎片的动量分布。观察到 D(+)和 Cl(+)碎片的与波形相关的反相关的定向发射。我们的结果与计算的比较表明，通过载波包络相位对光场进行调整可以控制 DCl(+)的取向，从而控制分子离子断裂时带电碎片的定向发射。
