Search Results - "Birk, Paul"
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Measuring the frequency chirp of extreme-ultraviolet free-electron laser pulses by transient absorption spectroscopy
Published in Nature communications (28-01-2021)“…High-intensity ultrashort pulses at extreme ultraviolet (XUV) and x-ray photon energies, delivered by state-of-the-art free-electron lasers (FELs), are…”
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All-XUV Pump-Probe Transient Absorption Spectroscopy of the Structural Molecular Dynamics of Di-iodomethane
Published in Physical review. X (01-07-2021)“…In this work, we use an extreme-ultraviolet (XUV) free-electron laser (FEL) to resonantly excite theI:4d5/2–σ*transition of a gas-phase di-iodomethane (CH2I2)…”
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3
Laser-Induced Control of the Optical Response of Aluminum Phthalocyanine Chloride Complexes Dissolved in Ethanol
Published in Frontiers in physics (31-05-2021)“…We show that absorption spectra of aluminum chloride phthalocyanine (AlClPc) in the liquid phase can be dynamically modified through the time-resolved…”
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4
Strong-Field Extreme-Ultraviolet Dressing of Atomic Double Excitation
Published in Physical review letters (15-10-2019)Get full text
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5
Strong-field-gated buildup of a Rydberg series
Published in Physical review research (18-08-2020)“…The femtosecond-timescale formation of a Fano resonance in doubly excited helium has been recently observed, enabling a time-domain view into two-electron…”
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Attosecond Real-Time Observation of Recolliding Electron Trajectories in Helium at Low Laser Intensities
Published in Physical review letters (05-05-2023)“…Laser-driven recollision physics is typically accessible only at field intensities high enough for tunnel ionization. Using an extreme ultraviolet pulse for…”
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7
Strong-Field Extreme-Ultraviolet Dressing of Atomic Double Excitation
Published in Physical review letters (16-10-2019)“…We report on the experimental observation of a strong-field dressing of an autoionizing two-electron state in helium with intense extreme-ultraviolet laser…”
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8
Nonlinear Coherence Effects in Transient-Absorption Ion Spectroscopy with Stochastic Extreme-Ultraviolet Free-Electron Laser Pulses
Published in Physical review letters (04-09-2019)“…We demonstrate time-resolved nonlinear extreme-ultraviolet absorption spectroscopy on multiply charged ions, here applied to the doubly charged neon ion,…”
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9
XUV-Initiated Dissociation Dynamics of Molecular Oxygen (O2)
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (02-12-2021)“…We performed a time-resolved spectroscopy experiment on the dissociation of oxygen molecules after the interaction with intense extreme-ultraviolet (XUV) light…”
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10
Laser-induced modification of an excited-state vibrational wave packet in neutral H 2 observed in a pump-control scheme
Published in Physical review research (01-09-2024)“…We observe and modify a molecular vibrational wave packet in an electronically excited state of the neutral hydrogen molecule. In an extreme-ultraviolet (XUV)…”
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11
Laser-induced modification of an excited-state vibrational wave packet in neutral H_{2} observed in a pump-control scheme
Published in Physical review research (01-09-2024)“…We observe and modify a molecular vibrational wave packet in an electronically excited state of the neutral hydrogen molecule. In an extreme-ultraviolet (XUV)…”
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12
Strong-field-induced single and double ionization dynamics from single and double excitations in a two-electron atom
Published in Journal of physics communications (01-05-2020)“…Two-electron dynamics of an excited model atom interacting with moderately strong laser fields is analyzed in the time domain. We solve the time-dependent…”
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13
Observing the relative sign of excited-state dipole transitions by combining attosecond streaking and transient absorption spectroscopy
Published 05-03-2024“…The electronic structure of atomic quantum systems and their dynamical interaction with light is reflected in transition dipole matrix elements coupling the…”
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14
Laser control of an excited-state vibrational wave packet in neutral H$_2
Published 10-01-2023“…We observe and control a molecular vibrational wave packet in an electronically excited state of the neutral hydrogen molecule. In an extreme-ultraviolet (XUV)…”
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15
Real-time reconstruction of complex non-equilibrium quantum dynamics of matter
Published 22-06-2017“…Causality implies that by measuring an absorption spectrum, the time-dependent linear response function can be retrieved. Recent experiments suggest a link…”
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16
Nonlinear coherence effects in transient-absorption ion spectroscopy with stochastic extreme-ultraviolet free-electron laser pulses
Published 16-07-2019“…Phys. Rev. Lett. 123, 103001 (2019) We demonstrate time-resolved nonlinear extreme-ultraviolet absorption spectroscopy on multiply charged ions, here applied…”
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17
Strong-field extreme-ultraviolet dressing of atomic double excitation
Published 16-07-2019“…Phys. Rev. Lett. 123, 163201 (2019) We report on the experimental observation of strong-field dressing of an autoionizing two-electron state in helium with…”
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18
Time-resolved four-wave-mixing spectroscopy for inner-valence transitions
Published 29-10-2015“…Non-collinear four-wave mixing (FWM) techniques at near-infrared (NIR), visible, and ultraviolet frequencies have been widely used to map vibrational and…”
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