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Journal Article

Ionization with low-frequency fields in the tunneling regime


Britz,  Alexander
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
ICFO-Institut de Ciences Fotoniques, 08860 Castelldefels (Barcelona), Spain;

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Dura, J., Camus, N., Thai, A., Britz, A., Hemmer, M., Baudisch, M., et al. (2013). Ionization with low-frequency fields in the tunneling regime. Scientific Reports, 3: 2675. doi:10.1038/srep02675.

Cite as: http://hdl.handle.net/11858/00-001M-0000-002D-7DB8-2
Strong-field ionisation surprises with richness beyond current understanding despite decade long investigations. Ionisation with mid-IR light has promptly revealed unexpected kinetic energy structures that seem related to unanticipated quantum trajectories of the electrons. We measure first 3D momentum distributions in the deep tunneling regime (γ = 0.3) and observe surprising new electron dynamics of near-zero momentum electrons and extremely low momentum structures, below the eV, despite very high quiver energies of 95 eV. Such level of high-precision measurements at only 1 meV above the threshold, despite 5 orders higher ponderomotive energies, has now become possible with a specifically developed ultrafast mid-IR light source in combination with a reaction microscope, thereby permitting a new level of investigations into mid-IR recollision physics.