In situ characterization of few-cycle laser pulses in transient absorption spectroscopy

Abstract

Attosecond transient absorption spectroscopy has thus far been lacking the capability to simultaneously characterize the intense laser pulses at work within a time-resolved quantum-dynamics experiment. However, precise knowledge of these pulses is key to extracting quantitative information in strong-field highly nonlinear light-matter interactions. Here, we introduce and experimentally demonstrate an ultrafast metrology tool based on the time-delay-dependent phase shift imprinted on a strong-field driven resonance. Since we analyze the signature of the laser pulse interacting with the absorbing spectroscopy target, the laser pulse duration and intensity are determined in situ. As we also show, this approach allows for the quantification of time-dependent bound-state dynamics in one and the same experiment. In the future, such experimental data will facilitate more precise tests of strong-field dynamics theories.

References in corpus (5)

• Lorentz meets Fano spectral line shapes: A universal phase and its laser control
• Transient absorption and reshaping of ultrafast XUV light by laser-dressed helium
• Theory of attosecond transient absorption spectroscopy of strong-field-generated ions
• Quantum state-resolved probing of strong-field-ionized xenon atoms using femtosecond high-order harmonic transient absorption spectroscopy
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Cited by in corpus (4)

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