Two-dimensional spectral interpretation of time-dependent absorption near laser-coupled resonances
arXiv:1403.2609 · doi:10.1088/0953-4075/47/12/124008
Abstract
We demonstrate a two-dimensional time-domain spectroscopy method to extract amplitude and phase modifications of excited atomic states caused by the interaction with ultrashort laser pulses. The technique is based on Fourier analysis of the absorption spectrum of perturbed polarization decay. An analytical description of the method reveals how amplitude and phase information can be directly obtained from measurements. We apply the method experimentally to the helium atom, which is excited by attosecond-pulsed extreme ultraviolet light, to characterize laser-induced couplings of doubly-excited states.
arXiv comment8 pages, 5 figures
References in corpus (9)
- 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
- Femtosecond induced transparency and absorption in the extreme ultraviolet by coherent coupling of the He 2s2p (1P0) and 2p2 (1Se) double excitation states with 800 nm light
- Coherent ultrafast core-hole correlation spectroscopy: x-ray analogues of multidimensional NMR
- Photoionization of helium by attosecond pulses: extraction of spectra from correlated wave functions
- Absorption and emission of single attosecond light pulses in an autoionizing gaseous medium dressed by a time-delayed control field
- Photoabsorption of attosecond XUV light pulses by two strongly laser-coupled autoionizing states
Cited by in corpus (8)
- Time-resolved four-wave-mixing spectroscopy for inner-valence transitions
- Impact of intense laser pulses on the autoionization dynamics of the 2s2p doubly-excited state of He
- In situ characterization of few-cycle laser pulses in transient absorption spectroscopy
- Deterministic strong-field quantum control
- Transient-absorption phases with strong probe and pump pulses
- Ultrafast dynamic evolution of multilevel systems in medium-strength laser fields
- Phase evolution of strong-field ionization
- Sub-cycle symmetry breaking of atomic bound states interacting with a short and strong laser pulse in a time-domain picture