263 citations · 958 across the 15 of their papers we have counts for
15 papers
Time-resolved SNOM via phase-domain sampling
Philipp Schwendke, Julia Stähler, Samuel Palato
Time-resolved scanning near-field optical microscopy (tr-SNOM) enables the measurement of the dynamic optical response of functional surfaces beyond the diffraction limit. Experime…
Discontinuous character of the ultrafast exciton Mott transition in monolayer WS
Subhadra Mohapatra, Samuel Palato, Nicholas Olsen +2
There are conflicting predictions and reports on the character of the exciton Mott transition (EMT) in monolayer transition metal dichalcogenides. It could be either a discontinuou…
Right On Time: Ultrafast Charge Separation Before Hybrid Exciton Formation
Lukas Gierster, Olga Turkina, Jan-Christoph Deinert +6
Organic/inorganic hybrid systems offer great potential for novel solar cell design combining the tunability of organic chromophore absorption properties with high charge carrier mo…
reduction at a DMSO/Cu(111) model battery interface
Angelika Demling, Sarah B. King, Philip Shushkov +1
In order to develop a better understanding of electrochemical reduction in non-aqueous solvents, we apply two-photon photoelectron spectroscopy to probe the dynamics…
Ultrafast charge carrier and exciton dynamics in an excitonic insulator probed by time-resolved photoemission spectroscopy
Selene Mor, Marc Herzog, Claude Monney +1
An excitonic insulator phase is expected to arise from the spontaneous formation of electron-hole pairs (excitons) in semiconductors where the exciton binding energy exceeds the si…
Dynamic screening of quasiparticles in WS monolayers
Stefano Calati, Qiuyang Li, Xiaoyang Zhu +1
We unravel the influence of quasiparticle screening in the non-equilibrium exciton dynamics of monolayer WS. We report pump photon energy-dependent exciton blue and red-shifts…
Ultrafast generation and decay of a surface metal
Lukas Gierster, Sesha Vempati, Julia Stähler
Band bending at semiconductor surfaces induced by chemical doping or electric fields can create metallic surfaces with properties not found in the bulk, such as high electron mobil…
Inhibition of the photoinduced structural phase transition in the excitonic insulator TaNiSe
Selene Mor, Marc Herzog, Johannes Noack +7
Femtosecond time-resolved mid-infrared reflectivity is used to investigate the electron and phonon dynamics occurring at the direct band gap of the excitonic insulator TaNiSe$_…
Ultrafast Electronic Band Gap Control in an Excitonic Insulator
Selene Mor, Marc Herzog, Denis Golež +8
We report on the nonequilibrium dynamics of the electronic structure of the layered semiconductor TaNiSe investigated by time- and angle-resolved photoelectron spectroscopy…
Local Aspects of Hydrogen-Induced Metallization of the ZnO(100) Surface
J. -C. Deinert, O. T. Hofmann, M. Meyer +2
This study combines surface-sensitive photoemission experiments with density functional theory (DFT) to give a microscopic description of H adsorption-induced modifications of the…
Localization-dependent charge separation efficiency at an organic/inorganic hybrid interface
Laura Foglia, Lea Bogner, Martin Wolf +1
By combining complementary optical techniques, photoluminescence and time-resolved excited state absorption, we achieve a comprehensive picture of the relaxation processes in the o…
Ultrafast exciton formation at the ZnO(100) surface
J. -C. Deinert, D. Wegkamp, M. Meyer +3
We study the ultrafast quasiparticle dynamics in and below the ZnO conduction band using femtosecond time-resolved two-photon photoelectron spectroscopy. Above band gap excitation…
Instantaneous band gap collapse in photoexcited monoclinic VO due to photocarrier doping
Daniel Wegkamp, Marc Herzog, Lede Xian +8
Using femtosecond time-resolved photoelectron spectroscopy we demonstrate that photoexcitation transforms monoclinic VO quasi-instantaneously into a metal. Thereby, we exclude…
Pressure dependent relaxation in the photo-excited Mott insulator ETF2TCNQ: Influence of hopping and correlations on quasiparticle recombination rates
M. Mitrano, G. Cotugno, S. R. Clark +12
Femtosecond relaxation of photo-excited quasiparticles in the one dimensional Mott insulator ET-F2TCNQ are measured as a function of external pressure, which is used to tune the el…
Ultrafast changes in lattice symmetry probed by coherent phonons
Simon Wall, Daniel Wegkamp, Laura Foglia +4
The electronic and structural properties of a material are strongly determined by its symmetry. Changing the symmetry via a photoinduced phase transition offers new ways to manipul…