167 citations · 431 across the 11 of their papers we have counts for
12 papers
Floquet density response in laser-assisted fast-electron scattering from solids
Ferdinand Evers, Sascha Schäfer, Richard Korytár
We extend the Bethe--Floquet formalism of Joachain and coworkers, originally developed for laser-assisted electron--atom collisions, to inelastic scattering of fast electrons from…
Vibrational high-harmonics and period-doubling bifurcation probed by time-resolved electron diffraction
Alexander Schröder, Kai Nettersheim, Ferdinand Evers +1
Nanoscale mechanical oscillators exhibit a plethora of nonlinear phenomena with promising applications for the sensing and clocking of processes down to atomic length scales. Oscil…
Visualizing Transient Ordering Phenomena in Dense Nanoparticle Clouds
Rieke von Seggern, Jasmin Pongratz, Christine Ziegler +1
The dynamics of nanoparticles within nanoscale liquid environments exhibit a range of complex phenomena driven by the interplay of processes at varying length scales. While these d…
Spectrally resolved free electron-light coupling strength in a transition metal dichalcogenide
Niklas Müller, Soufiane el Kabil, Gerrit Vosse +3
Recent advancements in electron microscopy have introduced innovative techniques enabling the inelastic interaction of fast electrons with tightly confined and intense light fields…
Inelastic electron-light scattering at dielectric thin films
Niklas Müller, Gerrit Vosse, Ferdinand Evers +1
In a recently developed methodology termed photon induced near-field electron microscopy (PINEM), the inelastic scattering of electrons off illuminated nanostructures provides dire…
Structural dynamics probed by high-coherence electron pulses
Armin Feist, Gero Storeck, Sascha Schäfer +1
Ultrafast measurement technology provides essential contributions to our microscopic understanding of the properties and functions of solids and nanostructures. Atomic-scale vistas…
Orbital angular momentum superposition states in transmission electron microscopy and bichromatic multiphoton ionization
K. Eickhoff, C. Rathje, D. Köhnke +5
The coherent control of electron beams and ultrafast electron wave packets dynamics have attracted significant attention in electron microscopy as well as in atomic physics. In ord…
High-purity free-electron momentum states prepared by three-dimensional optical phase modulation
Armin Feist, Sergey V. Yalunin, Sascha Schäfer +1
We demonstrate the quantized transfer of photon energy and transverse momentum to a high-coherence electron beam. In an ultrafast transmission electron microscope, a three-dimensio…
Few-nm tracking of magnetic vortex orbits and their decay with ultrafast Lorentz microscopy
Marcel Möller, John Henri Gaida, Sascha Schäfer +1
Transmission electron microscopy is one of the most powerful techniques to characterize nanoscale magnetic structures. In light of the importance of fast control schemes of magneti…
Nanoscale mapping of ultrafast magnetization dynamics with femtosecond Lorentz microscopy
Nara Rubiano da Silva, Marcel Möller, Armin Feist +3
Novel time-resolved imaging techniques for the investigation of ultrafast nanoscale magnetization dynamics are indispensable for further developments in light-controlled magnetism.…
Polarized photoluminescence clocks ultrafast pseudospin relaxation in graphene
Thomas Danz, Andreas Neff, John H. Gaida +3
Electronic states in 2D materials can exhibit pseudospin degrees of freedom, which allow for unique carrier-field interaction scenarios. Here, we investigate ultrafast sublattice p…
Ramsey-type phase control of free electron beams
Katharina E. Echternkamp, Armin Feist, Sascha Schäfer +1
Interference between multiple distinct paths is a defining property of quantum physics, where "paths" may involve actual physical trajectories, as in interferometry, or transitions…