Abstract
The advent of mid-IR laser sources (λ ≥ 3.0 µm) permits scrutinizing strong-field photoionization of atoms and molecules deep into the tunnelling regime and unexpected features are being revealed [1]. A low kinetic energy structure (LES) was observed in the experimental photoelectron energy distribution and it was conspicuously absent in semi-classical and Keldysh-Faisal-Reiss (KFR) calculations. Further measurements are required revealing a full 3D momentum picture of the before-mentioned effects.
© 2013 IEEE
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