Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW LETTERS 107 (2011), 183001; doi: 10.1103/PhysRevLett.107.183001 Copyright (c) 2011 American Physical Society. Used by permission.


The dynamics of low-energy photoelectrons (PEs) ionized by a single attosecond pulse in the presence of an intense infrared (IR) laser field is investigated. Whereas attosecond streaking usually involves momentum shifts of high-energy PEs, when PEs have low initial kinetic energies, the IR field can control the continuum-electron dynamics by inducing PE scattering from the residual ion. A semiclassical model is used to show that particular PE trajectories in the continuum involving electron-ion scattering explain the interference patterns exhibited in the low-energy PE spectrum. We confirm the effects of the trajectories by means of a full quantum simulation.

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