Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Hoefer, Ulrich"'
Autor:
Adamkiewicz, Alexa, Raths, Miriam, Stettner, Monja, Theilen, Marcel, Münster, Lasse, Wenzel, Sabine, Hutter, Mark, Soubatch, Sergey, Kumpf, Christian, Bocquet, François C., Wallauer, Robert, Tautz, Frank Stefan, Höfer, Ulrich
Publikováno v:
J.Phys.Chem.C 127, 20411 (2023)
Time-resolved photoemission orbital tomography (tr-POT) offers unique possibilities for tracing molecular electron dynamics. The recorded pump-induced changes of the angle-resolved photoemission intensities allow to characterize unoccupied molecular
Externí odkaz:
http://arxiv.org/abs/2311.13212
Autor:
Mette, Gerson, Ishioka, Kunie, Youngkin, Steven, Stolz, Wolfgang, Volz, Kerstin, Höfer, Ulrich
Ultrafast carrier and phonon dynamics at the buried heterointerface of GaP/Si(001) are investigated by means of two-color pump-probe reflectivity measurements. The carrier-induced reflectivity signal exhibits a resonant enhancement at pump-photon ene
Externí odkaz:
http://arxiv.org/abs/2305.04362
Autor:
Ishioka, Kunie, Angerhoffer, Ethan, Stanton, Christopher J., Mette, Gerson, Volz, Kerstin, Stolz, Wolfgang, Höfer, Ulrich
Transient reflectivity spectroscopy is widely used to study ultrafast carrier- and phonon-dynamics in semiconductors. In their heterostructures, it is often not straightforward to distinguish contributions to the signal from the various layers. In th
Externí odkaz:
http://arxiv.org/abs/2110.03899
Autor:
Wallauer, Robert, Perea-Causin, Raul, Münster, Lasse, Zajusch, Sarah, Brem, Samuel, Güdde, Jens, Tanimura, Katsumi, Lin, Kaiqiang, Huber, Rupert, Malic, Ermin, Höfer, Ulrich
The dynamics of exciton formation in transition metal dichalcogenides is difficult to measure experimentally, since many momentum-indirect exciton states are not accessible to optical interband spectroscopy. Here, we combine a tuneable pump, high-har
Externí odkaz:
http://arxiv.org/abs/2012.11385
Autor:
Güdde, Jens, Höfer, Ulrich
This article reviews experimental work on the ultrafast electron dynamics in the topological surface state (TSS) of three-dimensional (3D) topological insulators (TIs) observed with time- and angle-resolved two-photon photoemission (2PPE). The focus
Externí odkaz:
http://arxiv.org/abs/2010.14482
Autor:
Wallauer, Robert, Raths, Miriam, Stallberg, Klaus, Münster, Lasse, Brandstetter, Dominik, Yang, Xiaosheng, Güdde, Jens, Puschnig, Peter, Soubatch, Serguei, Kumpf, Christian, Bocquet, Francois C., Tautz, Frank Stefan, Höfer, Ulrich
Publikováno v:
Science, 10.1126/science.abf3286 (2021)
Frontier orbitals, i.e., the highest occupied and lowest unoccupied orbitals of a molecule, generally determine molecular properties, such as chemical bonding and reactivities. Consequently, there has been a lot of interest in measuring them, despite
Externí odkaz:
http://arxiv.org/abs/2010.02599
Akademický článek
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Autor:
Ishioka, Kunie, Beyer, Andreas, Stolz, Wolfgang, Volz, Kerstin, Petek, Hrvoje, Höfer, Ulrich, Stanton, Christopher J.
Thin GaP films can be grown on an exact Si(001) substrate with nearly perfect lattice match. We perform all-optical pump-probe measurements to investigate the ultrafast electron-phonon coupling at the buried interface of GaP/Si. Above-bandgap excitat
Externí odkaz:
http://arxiv.org/abs/1810.10715
Akademický článek
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Autor:
Ishioka, Kunie, Rustagi, Avinash, Beyer, Andreas, Stolz, Wolfgang, Volz, Kerstin, Hoefer, Ulrich, Petek, Hrvoje, Stanton, Christopher J.
Publikováno v:
Appl. Phys. Lett. 111, 062105 (2017)
We report on the optical generation and detection of ultrashort acoustic pulses that propagate in three-dimensional semiconductor crystals. Photoexcitaiton of lattice-matched GaP layers grown on Si(001) gives rise to a sharp spike in transient reflec
Externí odkaz:
http://arxiv.org/abs/1612.01239