Strong Field Quantum Path Control Using Attosecond Pulse Trains

Kenneth J. Schafer, Louisiana State University
Mette B. Gaarde, Louisiana State University
Arne Heinrich, ETH Zürich
Jens Biegert, ETH Zürich
Ursula Keller, ETH Zürich


We show that attosecond pulse trains have a natural application in the control of strong field processes. In combination with an intense infrared laser field, the pulse train can be used to microscopically select a single quantum path contribution to a process that would otherwise consist of several interfering components. We present calculations that demonstrate this by manipulating the time-frequency properties of high order harmonics at the single atom level. This quantum path selection can also be used to define a high resolution attosecond clock. © 2004 The American Physical Society.