Asymmetry in the strong-field ionization of Rydberg atoms by few-cycle pulses
SourcePhysical Review Letters, 92, 3, (2004), pp. 033002
Article / Letter to editor
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Molecular and Biophysics
Physical Review Letters
SubjectMolecular and Biophysics
We present measurements of the electron ejection direction in the ionization of high (n=90) Rydberg states of rubidium subjected to few-cycle radio-frequency (RF) pulses. For weak pulses we find a strong asymmetry for even (cosine) pulses and no asymmetry for odd (sine) pulses. This asymmetry disappears for pulses longer than four RF cycles. For strong pulses, very large asymmetry is found for both sine and cosine pulses that persists up to eight RF cycles and is attributed to initial state depletion effects within a cycle.
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