Autoionization Dynamics of (2P1/2)ns/d States in Krypton Probed by Noncollinear Wave Mixing with Attosecond Extreme Ultraviolet and Few-Cycle Near Infrared Pulses

11 June 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The autoionization dynamics of the (2P1/2)ns/d Rydberg states in krypton are investigated using wave-mixing signals generated with subfemtosecond XUV pulses and noncollinear, few-cycle NIR pulses. Despite quantum beat oscillations from the XUV-induced coherence, these wave-mixing spectra allow for the simultaneous evaluation of autoionization lifetimes from a series of Rydberg states. Experimentally measured lifetimes for the wave-mixing signals emitting from the (2P1/2)6d/8s, 7d/9s, and 8d/10s resonances compare favorably with lifetimes for the (2P1/2)6d, 7d, and 8d Rydberg states determined from spectral linewidths. Analysis of the quantum beats reveals that the enhancement of wave-mixing pathways leads to reporter state-dependent decays in the wave-mixing signals. The results demonstrate the promise of wave-mixing spectroscopies with subfemtosecond XUV pulses to provide valuable insights into processes governed by electronic dynamics.

Keywords

attosecond
nonlinear spectroscopy
autoionization
krypton
wave-mixing

Supplementary materials

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Title
Fidler-Krypton-Autoionizing-States-Manuscript
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Fidler-Krypton-Autoionizing-States-Supplement
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