Mathieu Gisselbrecht
YOU?
Author Swipe
View article: Attosecond spectroscopy reveals spontaneous symmetry breaking in molecular photoionization
Attosecond spectroscopy reveals spontaneous symmetry breaking in molecular photoionization Open
Spontaneous symmetry breaking, driven by nonadiabatic electron-nuclear coupling, can lead to geometric complexity in molecules and solids. While structural distortion from symmetry breaking occurs in femtoseconds, the timescale to lift ele…
View article: Impact of oblique reflections on the generation of isolated attosecond pulses by polarization gating
Impact of oblique reflections on the generation of isolated attosecond pulses by polarization gating Open
Isolated attosecond pulses are often generated via sub-optical-cycle polarization gating. This technique, based on the precise control of the time-dependent polarization of the infrared driver pulse, enables strong temporal confinement of …
View article: Subcycle phase matching effects in short attosecond pulse trains
Subcycle phase matching effects in short attosecond pulse trains Open
High-order harmonic generation (HHG) in gases driven by intense laser fields has become a cornerstone technique for producing attosecond pulses and probing ultrafast electronic motion in matter. By manipulating the microscopic and macrosco…
View article: Photoionization time delays probe electron correlations
Photoionization time delays probe electron correlations Open
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 electron with other electrons, referred to as electron correlation…
View article: Measuring the quantum state of photoelectrons
Measuring the quantum state of photoelectrons Open
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. However, since the photoelectron is a quantum object, its…
View article: Influence of final state interactions in attosecond photoelectron interferometry
Influence of final state interactions in attosecond photoelectron interferometry Open
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 interferometric techniques have been used to measure the a…
View article: The influence of final state interactions in attosecond photoelectron interferometry
The influence of final state interactions in attosecond photoelectron interferometry Open
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 interferometric techniques have been used to measure the am…
View article: Controlled molecule injector for cold, dense, and pure molecular beams at the European x-ray free-electron laser
Controlled molecule injector for cold, dense, and pure molecular beams at the European x-ray free-electron laser Open
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 x-ray free-electron laser (EuXFEL). A $b$-type electrostati…
View article: Generation of entanglement using a short-wavelength seeded free-electron laser
Generation of entanglement using a short-wavelength seeded free-electron laser Open
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 investigate the entanglement generated over ultrafast timescal…
View article: Generation of entanglement using a short-wavelength seeded free-electron laser
Generation of entanglement using a short-wavelength seeded free-electron laser Open
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 investigate the entanglement generated over ultrafast timescal…
View article: Isotope effects in dynamics of water isotopologues inducedby core ionization at an x-ray free-electron laser
Isotope effects in dynamics of water isotopologues inducedby core ionization at an x-ray free-electron laser Open
View article: Measuring the quantum state of photoelectrons
Measuring the quantum state of photoelectrons Open
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. However, since the photoelectron is a quantum object, its…
View article: Ultra-stable and versatile high-energy resolution setup for attosecond photoelectron spectroscopy
Ultra-stable and versatile high-energy resolution setup for attosecond photoelectron spectroscopy Open
Attosecond photoelectron spectroscopy has opened up for studying light–matter interaction on ultrafast time scales. It is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and chara…
View article: Isotope effects in dynamics of water isotopologues induced by core ionization at an x-ray free-electron laser
Isotope effects in dynamics of water isotopologues induced by core ionization at an x-ray free-electron laser Open
Dynamical response of water exposed to x-rays is of utmost importance in a wealth of science areas. We exposed isolated water isotopologues to short x-ray pulses from a free-electron laser and detected momenta of all produced ions in coinc…
View article: Resonant Inner-Shell Photofragmentation of Adamantane (C10H16)
Resonant Inner-Shell Photofragmentation of Adamantane (C10H16) Open
Adamantane, the smallest diamondoid molecule with a symmetrical cage, contains two distinct carbon sites, CH and CH2. The ionization/excitation of the molecule leads to the cage opening and strong structural reorganization. While theoretic…
View article: Ultra-stable and versatile high-energy resolution setup for attosecond photoelectron spectroscopy
Ultra-stable and versatile high-energy resolution setup for attosecond photoelectron spectroscopy Open
Attosecond photoelectron spectroscopy is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and characterize in detail an actively stabilized, versatile, high spectral resolution att…
View article: Resonant two-photon ionization of helium atoms studied by attosecond interferometry
Resonant two-photon ionization of helium atoms studied by attosecond interferometry Open
We study resonant two-photon ionization of helium atoms via the 1 s 3 p , 1 s 4 p and 1 s 5 p 1 P 1 states using the 15 th harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ionization. …
View article: Continuous-variable quantum state tomography of photoelectrons
Continuous-variable quantum state tomography of photoelectrons Open
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 light pulses. Our protocol is benchmarked against a direct calc…
View article: Attosecond dynamics of multi-channel single photon ionization
Attosecond dynamics of multi-channel single photon ionization Open
View article: Observation of Rabi dynamics with a short-wavelength free-electron laser
Observation of Rabi dynamics with a short-wavelength free-electron laser Open
Rabi oscillations are periodic modulations of populations in two-level systems interacting with a time-varying field 1 . They are ubiquitous in physics with applications in different areas such as photonics 2 , nano-electronics 3 , electro…
View article: Probing electronic decoherence with high-resolution attosecond photoelectron interferometry
Probing electronic decoherence with high-resolution attosecond photoelectron interferometry Open
View article: Resonant two-photon ionization of helium atoms studied by attosecond interferometry
Resonant two-photon ionization of helium atoms studied by attosecond interferometry Open
We study resonant two-photon ionization of helium atoms via the $1s3p$, $1s4p$ and $1s5p^1$P$_1$ states using the 15$^\mathrm{th}$ harmonic of a titanium-sapphire laser for the excitation and a weak fraction of the laser field for the ioni…
View article: Continuous variable quantum state tomography of photoelectrons
Continuous variable quantum state tomography of photoelectrons Open
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 light pulses. Our protocol is benchmarked against a direct calc…
View article: The origin of enhanced $${{{{{{{{\rm{O}}}}}}}}}_{2}^{+}$$ production from photoionized CO2 clusters
The origin of enhanced $${{{{{{{{\rm{O}}}}}}}}}_{2}^{+}$$ production from photoionized CO2 clusters Open
View article: Studying ultrafast Rabi dynamics with a short-wavelength seeded free-electron laser
Studying ultrafast Rabi dynamics with a short-wavelength seeded free-electron laser Open
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 areas such as photonics, nano-electronics, electron microsc…
View article: Site-dependent nuclear dynamics in core-excited butadiene
Site-dependent nuclear dynamics in core-excited butadiene Open
Auger decay from terminal carbon (left) leads to dynamic processes while Auger decay from the central carbon site in butadiene does not.
View article: Coincidence study of core-ionized adamantane: site-sensitivity within a carbon cage?
Coincidence study of core-ionized adamantane: site-sensitivity within a carbon cage? Open
Can we observe site-sensitivity after X-ray core-ionisation of a symmetric molecule composed of the same heavy atom such as the carbon cage adamantane? We investigate this question using electron-ion coincidence spectroscopy and theoretica…
View article: Inner-Shell-Ionization-Induced Femtosecond Structural Dynamics of Water Molecules Imaged at an X-Ray Free-Electron Laser
Inner-Shell-Ionization-Induced Femtosecond Structural Dynamics of Water Molecules Imaged at an X-Ray Free-Electron Laser Open
The ultrafast structural dynamics of water following inner-shell ionization is a crucial issue in high-energy radiation chemistry. We have exposed isolated water molecules to a short X-ray pulse from a free-electron laser and detected mome…
View article: Probing electronic decoherence with high-resolution attosecond photoelectron interferometry
Probing electronic decoherence with high-resolution attosecond photoelectron interferometry Open
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 is a well known source of decoherence when only one of the …
View article: Complete characterization of multi-channel single photon ionization
Complete characterization of multi-channel single photon ionization Open
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 dynamics of the ionization process. These wavepackets can be descr…