Publications (21)
Complete characterization of multi-channel single photon ionization
Jasper Peschel, David Busto, Marius Plach +11
Ionization of atoms and molecules by absorption of a light pulse results in electron wavepackets carrying information on the atomic or molecular structure as well as on the dynamic…
A high-repetition rate attosecond light source for time-resolved coincidencespectroscopy
Sara Mikaelsson, Jan Vogelsang, Chen Guo +12
Attosecond pulses, produced through high-order harmonic generation in gases, have been successfully used for observing ultrafast, sub-femtosecond electron dynamics in atoms, molecu…
The influence of final state interactions in attosecond photoelectron interferometry
Sizuo Luo, Robin Weissenbilder, Hugo Laurell +14
Fano resonances are ubiquitous phenomena appearing in many fields of physics, e.g. atomic or molecular photoionization, or electron transport in quantum dots. Recently, attosecond…
Attosecond electron-spin dynamics in Xe 4d photoionization
Shiyang Zhong, Jimmy Vinbladh, David Busto +12
The photoionization of xenon atoms in the 70-100 eV range reveals several fascinating physical phenomena such as a giant resonance induced by the dynamic rearrangement of the elect…
Probing electronic decoherence with high-resolution attosecond photoelectron interferometry
David Busto, Hugo Laurell, Daniel Finkelstein Shapiro +14
Quantum coherence plays a fundamental role in the study and control of ultrafast dynamics in matter. In the case of photoionization, entanglement of the photoelectron with the ion…
Fission of charged nano-hydrated ammonia clusters -- microscopic insights on the nucleation processes
Bart Oostenrijk, DarÃo Barreiro, Noelle Walsh +6
While largely studied on the macroscopic scale, the dynamics leading to nucleation and fission processes in atmospheric aerosols are still poorly understood at the molecular level.…
The role of charge and proton transfer in fragmentation of hydrogen-bonded nanosystems: the breakup of ammonia clusters upon single photon multi-ionization
Bart Oostenrijk, Noelle Walsh, Joakim Laksman +4
The charge and proton dynamics in hydrogen-bonded networks are investigated using ammonia as a model system. The fragmentation dynamics of medium-sized clusters (1-2 nm) upon singl…
Zeno-clocking the Auger decay
Emil Viñas Boström, Mathieu Gisselbrecht, Tomas Brage +3
A tenet of time-resolved spectroscopy is -faster laser pulses for shorter timescales- . Here we suggest turning this paradigm around, and slow down the system dynamics via repeated…
Generation of entanglement using a short-wavelength seeded free-electron laser
Saikat Nandi, Axel Stenquist, Asimina Papoulia +25
Quantum entanglement between the degrees of freedom encountered in the classical world is challenging to observe due to the surrounding environment. To elucidate this issue, we inv…
Controlled molecule injector for cold, dense, and pure molecular beams at the European x-ray free-electron laser
Lanhai He, Melby Johny, Thomas Kierspel +27
A permanently available molecular-beam injection setup for controlled molecules (COMO) was installed and commissioned at the small quantum systems (SQS) instrument at the European…
Phase Control of Attosecond Pulses in a Train
Chen Guo, Anne Harth, Stefanos Carlström +12
Ultrafast processes in matter can be captured and even controlled by using sequences of few-cycle optical pulses, which need to be well characterized, both in amplitude and phase.…
Controlling the Photoelectric Effect in the Time Domain
Yu-Chen Cheng, Sara Mikaelsson, Saikat Nandi +9
When an atom or molecule absorbs a high-energy photon, an electron is emitted with a well-defined energy and a highly-symmetric angular distribution, ruled by energy quantization a…
Studying ultrafast Rabi dynamics with a short-wavelength seeded free-electron laser
Saikat Nandi, Edvin Olofsson, Mattias Bertolino +26
Rabi oscillations are periodic modulations of populations in two-level systems interacting with a time-varying field. They are ubiquitous in physics with applications in different…
Quantum Coherence in Photo-Ionization with Tailored XUV Pulses
Stefanos Carlström, Johan Mauritsson, Kenneth J. Schafer +2
Ionization with ultrashort pulses in the extreme ultraviolet (XUV) regime can be used to prepare an ion in a superposition of spin--orbit substates. In this work, we study the cohe…
Measuring the quantum state of photoelectrons
Hugo Laurell, Sizuo Luo, Robin Weissenbilder +17
A photoelectron, emitted due to the absorption of light quanta as described by the photoelectric effect, is often characterized experimentally by a classical quantity, its momentum…
Photoionization time delays probe electron correlations
Mingxuan Li, Huiyong Wang, Rezvan Tahouri +16
The photoelectric effect, explained by Einstein in 1905, is often regarded as a one-electron phenomenon. However, in multi-electron systems, the interaction of the escaping electro…
Ultra-stable and versatile high-energy resolution setup for attosecond photoelectron spectroscopy
Sizuo Luo, Robin Weissenbilder, Hugo Laurell +12
Attosecond photoelectron spectroscopy is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and characterize in detail an a…
A Versatile Velocity Map Ion-Electron Covariance Imaging Spectrometer for High-Intensity XUV Experiments
Linnea Rading, Jan Lahl, Sylvain Maclot +8
We report on the design and performance of a velocity map imaging (VMI) spectrometer optimized for experiments using high-intensity extreme ultraviolet (XUV) sources such as laser-…
Continuous variable quantum state tomography of photoelectrons
Hugo Laurell, Daniel Finkelstein-Shapiro, Christoph Dittel +12
We propose a continuous variable quantum state tomography protocol of electrons which result from the ionization of atoms or molecules by the absorption of extreme ultraviolet ligh…
Resonant two-photon ionization of helium atoms studied by attosecond interferometry
Lana NeoriÄiÄ, David Busto, Hugo Laurell +15
We study resonant two-photon ionization of helium atoms via the , and P states using the 15 harmonic of a titanium-sapphire laser for the exc…
Fano's propensity rule in angle-resolved attosecond pump-probe photoionization
David Busto, Jimmy Vinbladh, Shiyang Zhong +8
In a seminal article, Fano predicts that absorption of light occurs preferably with increase of angular momentum. Here we generalize Fano's propensity rule to laser-assisted photoi…