215 citations · 1.4k across the 37 of their papers we have counts for
38 papers
Direct Asymmetric Photochemistry with Synthetic Chiral Light
Jason B. Greenwood, Letizia Fede, Daniel García González +10
Circularly polarized light has long been used to distinguish the two mirror images of chiral molecules. Recently, a conceptual breakthrough has predicted that a new form of optical…
Enhanced Valley Polarization via Nonlinear Cascaded Quantum-Geometric Selection Rules
Quentin Courtade, Sotirios Fragkos, Dominique Descamps +4
The quantum geometric properties of Bloch electrons fundamentally govern light-matter interactions and optical selection rules in solids. In semiconducting transition-metal dichalc…
Dielectric Screening in Electromagnetic Dressing of Semiconductors
Quentin Courtade, Umberto Dellasette, Sotirios Fragkos +4
Nonequilibrium manipulation of quantum materials via electromagnetic dressing provides an on-demand route to tailoring electronic band structures through Floquet engineering. Time-…
Theory of Non-Dichroic Enantio-Sensitive Chiroptical Spectroscopy
Andrés Ordóñez, David Ayuso, Piero Decleva +4
We show that the photoelectron angular distributions produced by elliptical and cross-polarized two-color laser fields interacting with randomly oriented chiral molecules decompose…
Non-Dichroic Enantio-Sensitive Chiroptical Spectroscopy
Letizia Fede, Debobrata Rajak, Chris Sparling +8
Chiroptical effects using circularly polarized light produce signals that change sign when switching either molecular handedness (enantiosensitivity) or the light helicity (circula…
Electron-phonon-dominated charge-density-wave fluctuations in TiSe accessed by ultrafast nonequilibrium dynamics
Sotirios Fragkos, Hibiki Orio, Nina Girotto Erhardt +17
The complex phase diagram of 1T-TiSe2 consists of a charge density wave (CDW) below 200 K, and CDW fluctuations of still unknown origin at higher temperatures. Here, we use time-re…
Time- and Polarization-Resolved Extreme Ultraviolet Momentum Microscopy
Sotirios Fragkos, Quentin Courtade, Olena Tkach +7
We report the development of an instrument combining an ultrafast, high-repetition-rate, polarization-tunable monochromatic extreme ultraviolet (XUV, 21.6 eV) beamline and a next-g…
Floquet-Bloch Valleytronics
Sotirios Fragkos, Baptiste Fabre, Olena Tkach +6
Driving quantum materials out-of-equilibrium makes it possible to generate states of matter inaccessible through standard equilibrium tuning methods. Upon time-periodic coherent dr…
Excited States Band Mapping and Ultrafast Nonequilibrium Dynamics in Topological Dirac Semimetal 1T-ZrTe
Sotirios Fragkos, Evgenia Symeonidou, Emile Lasserre +7
We performed time- and polarization-resolved extreme ultraviolet momentum microscopy on topological Dirac semimetal candidate 1T-ZrTe. Excited states band mapping uncovers the…
Attosecond spectroscopy using vacuum-ultraviolet pulses emitted from laser-driven semiconductors
A. Nayak, D. Rajak, B. Farkas +9
Strongly laser-driven semiconductor crystals offer substantial advantages for the study of many-body physics and ultrafast optoelectronics via the high harmonic generation process.…
Strong-field ionization of chiral molecules with bicircular laser fields : sub-barrier dynamics, interference, and vortices
Samuel Beaulieu, Sylvain Larroque, Dominique Descamps +5
Strong-field ionization by counter-rotating two-color laser fields produces quantum interference between photoelectrons emitted on the leading and trailing edges of the laser field…
Multimode Objective Lens for Momentum Microscopy and XPEEM: Experiments
O. Tkach, S. Fragkos, D. Biswas +37
A new type of objective lens has recently been proposed for use in X-ray photoemission electron microscopes (XPEEMs) and momentum microscopes. Adding a ring electrode concentric wi…
Capturing electron-driven chiral dynamics in UV-excited molecules
Vincent Wanie, Etienne Bloch, Erik P. Månsson +13
Molecular chirality is a key design property for many technologies including bioresponsive imaging, circularly polarized light detection and emission, molecular motors and switches…
Enhanced chiral-sensitivity of Coulomb-focused electrons in strong field ionization
S Rozen, S Larroque, N Dudovich +2
Strong-field light-matter interactions initiate a wide range of phenomena in which the quantumpaths of electronic wavepackets can be manipulated by tailoring the laser field. Among…
Phase-resolved attosecond near-threshold photoionization of molecular nitrogen
S. Haessler, B. Fabre, J. Higuet +10
We photoionize nitrogen molecules with a train of extreme ultraviolet attosecond pulses together with a weak infrared field. We measure the phase of the two-color two-photon ioniza…
Ultrafast Polarization-Tunable Monochromatic Extreme Ultraviolet Source at High-Repetition-Rate
Antoine Comby, Debobrata Rajak, Dominique Descamps +5
We report on the development of a high-order harmonic generation (HHG)-based ultrafast high-repetition-rate (250 kHz) monochromatic extreme ultraviolet (21.6 eV) source with polari…
Time-resolved chiral X-Ray photoelectron spectroscopy with transiently enhanced atomic site-selectivity: a Free Electron Laser investigation of electronically excited fenchone enantiomers
D. Faccialà, M. Devetta, S. Beauvarlet +28
Chiral molecules are widespread in nature, playing a fundamental role in bio-chemical processes and in the origin of life itself. The observation of dynamics in chiral molecules is…
Role of Spin-Orbit Coupling in High-order Harmonic Generation Revealed by Super-Cycle Rydberg Trajectories
Nicola Mayer, Samuel Beaulieu, Alvaro Jimenez-Galan +7
High-harmonic generation is typically thought of as a sub-laser-cycle process, with the electron's excursion in the continuum lasting a fraction of the optical cycle. However, it w…
Bright, polarization-tunable high repetition rate extreme ultraviolet beamline for coincidence electron-ion imaging
Antoine Comby, Etienne Bloch, Sandra Beauvarlet +9
After decades of supremacy of the Titanium:Sapphire technology, Ytterbium-based high-order harmonic sources are emerging as an interesting alternative for experiments requiring hig…
Photoionization of chiral molecules by counter-rotating bicircular laser fields: a chiral attoclock
Samuel Beaulieu, Sylvain Larroque, Antoine Comby +6
Measuring and controlling the ionization dynamics by intense laser fields has recently led to important breakthroughs, from the investigation of tunneling time delays to attosecond…
Attosecond-resolved photoionization of chiral molecules
Samuel Beaulieu, Antoine Comby, Alex Clergerie +13
Chiral light-matter interactions have been investigated for two centuries, leading to the discovery of many chiroptical processes used for discrimination of enantiomers. Whereas mo…
Controlling Sub-Cycle Optical Chirality in the Photoionization of Chiral Molecules
Shaked Rozen, Antoine Comby, Etienne Bloch +8
Controlling the polarization state of electromagnetic radiation enables the investigation of fundamental symmetry properties of matter through chiroptical processes. Many strategie…
High-harmonics of harmonics of a fiber laser: a milliwatt XUV ultrashort source
Antoine Comby, Dominique Descamps, Aura Gonzalez +4
Recent progresses in femtosecond ytterbium-doped fiber laser technology areopening new perspectives in strong field physics and attosecond science. Highorder harmonic generation fr…
Probing electronic wavefunctions by all-optical attosecond interferometry
Doron Azoury, Omer Kneller, Shaked Rozen +7
Photoelectron spectroscopy is a powerful method that provides insight into the quantum mechanical properties of a wide range of systems. The ionized electron wavefunction carries i…