263 citations · 817 across the 18 of their papers we have counts for
18 papers
Ultrafast Dissipative Localization of Electronic Energy in AuPt Superlattices
C. Walz, M. Mattern, J. -E. Pudell +15
Controlling the spatial distribution of absorbed optical energy is central to nanoscale photothermal chemistry, plasmonics, and ultrafast materials control. Here, we show that a me…
Experimental evidence of dominant ultrafast diffusive energy transport by hot electrons in Cu
Jasmin Jarecki, Lisa Mehner, Maximilian Mattern +15
When the dimensions of structures shrink to the order of the inelastic mean free path of the energy-carrying quasi-particles, the character of energy transport changes from diffusi…
Unveiling the nanomorphology of HfN thin films by ultrafast reciprocal space mapping
Steffen Peer Zeuschner, Jan-Etienne Pudell, Maximilian Mattern +5
Hafnium Nitride (HfN) is a promising and very robust alternative to gold for applications of nanoscale metals. Details of the nanomorphology related to variations in strain states…
Concepts and use cases for picosecond ultrasonics with x-rays
Maximilian Mattern, Alexander von Reppert, Steffen Peer Zeuschner +3
This review discusses picosecond ultrasonics experiments using ultrashort hard x-ray probe pulses to extract the transient strain response of laser-excited nanoscopic structures fr…
Phonon-dominated energy transport in purely metallic heterostructures
M. Herzog, A. von Reppert, J. -E. Pudell +5
We use ultrafast x-ray diffraction to quantify the transport of energy in laser-excited nanoscale Au/Ni bilayers. Electron transport and efficient electron-phonon coupling in Ni co…
Full spatiotemporal control of laser-excited periodic surface deformations
J. -E. Pudell, M. Sander, R. Bauer +3
We demonstrate full control of acoustic and thermal periodic deformations at solid surfaces down to sub-nanosecond time scales and few-micrometer length scales via independent vari…
Tracking picosecond strain pulses in heterostructures that exhibit giant magnetostriction
S. P. Zeuschner T. Parpiiev, T. Pezeril, A. Hillion +8
We combine ultrafast X-ray diffraction (UXRD) and time-resolved Magneto-Optical Kerr Effect (MOKE) measurements to monitor the strain pulses in laser-excited TbFe2/Nb heterostructu…
Ultrafast negative thermal expansion driven by spin-disorder
J. Pudell, A. von Reppert, D. Schick +5
We measure the transient strain profile in a nanoscale multilayer system composed of Yttrium, Holmium and Niobium after laser excitation using ultrafast X-ray diffraction. The stra…
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$_…
Layer specific observation of slow thermal equilibration in ultrathin metallic nanostructures by femtosecond x-ray diffraction
J. Pudell, A. Maznev, M. Herzog +5
Ultrafast heat transport in nanoscale metal multilayers is of great interest in the context of optically-induced demagnetization, remagnetization and switching. We investigate the…
Quantitative disentanglement of coherent and incoherent laser-induced surface deformations by time-resolved x-ray reflectivity
Matthias Sander, Jan-Etienne Pudell, Marc Herzog +5
We present time-resolved x-ray reflectivity measurements on laser excited coherent and incoherent surface deformations of thin metallic films. Based on a kinematical diffraction mo…
Spatio-temporal coherent control of thermal excitations in solids
Mathias Sander, Marc Herzog, Jan-Etienne Pudell +9
X-ray reflectivity (XRR) measurements of femtosecond laser-induced transient gratings are applied to demonstrate the spatio-temporal coherent control of thermally induced surface d…
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…
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…
Localized excited charge carriers generate ultrafast inhomogeneous strain in the multiferroic BiFeO
D. Schick, M. Herzog, H. Wen +7
We apply ultrafast X-ray diffraction with femtosecond temporal resolution to monitor the lattice dynamics in a thin film of multiferroic BiFeO after above-bandgap photoexcitati…
Direct time domain sampling of sub-THz coherent acoustic phonon spectra in SrTiO using ultrafast X-ray diffraction
Roman Shayduk, Marc Herzog, André Bojahr +8
We synthesize sub-THz longitudinal quasi-monochromatic acoustic phonons in a SrTiO single crystal using a SrRuO/SrTiO superlattice as an optical-acoustic transducer. Th…
Following Strain-Induced Mosaicity Changes of Ferroelectric Thin Films by Ultrafast Reciprocal Space Mapping
D. Schick, A. Bojahr, M. Herzog +3
We investigate coherent phonon propagation in a thin film of ferroelectric PbZr0.2Ti0.8O3 (PZT) by ultrafast x-ray diffraction (UXRD) experiments, which are analyzed as time-resolv…
Ultrafast x-ray diffraction studies of photoexcited coherent phonons in SrRuO thin films
Daniel Schick, Peter Gaal, André Bojahr +6
We present ultrafast x-ray diffraction experiments on thin films of metallic SrRuO (SRO) after their excitation with ultrashort intense laser pulses. Depending on the layer thi…