97 citations · 236 across the 9 of their papers we have counts for
9 papers
Exciton propagation and halo formation in two-dimensional materials
Raul Perea-Causin, Samuel Brem, Roberto Rosati +6
The interplay of optics, dynamics and transport is crucial for the design of novel optoelectronic devices, such as photodetectors and solar cells. In this context, transition metal…
Spatio-temporal dynamics in graphene
Roland Jago, Raül Perea-Causin, Samuel Brem +1
Temporally and spectrally resolved dynamics of optically excited carriers in graphene has been intensively studied theoretically and experimentally, whereas carrier diffusion in sp…
Microscopic origin of the bolometric effect in graphene
Roland Jago, Ermin Malic, Florian Wendler
While the thermoelectric and photoconduction effects are crucial in pristine and low-doped graphene, the bolometric effect is known to dominate the photoresponse in biased graphene…
Carrier dynamics in graphene: ultrafast many-particle phenomena
Ermin Malic, Torben Winzer, Florian Wendler +10
Graphene is an ideal material to study fundamental Coulomb- and phonon-induced carrier scattering processes. Its remarkable gapless and linear band structure opens up new carrier r…
Anomalous optical saturation of low-energy Dirac states in graphene and its implication for nonlinear optics
Behrooz Semnani, Roland Jago, Safieddin Safavi-Naeini +3
We reveal that optical saturation of the low-energy states takes place in graphene for arbitrarily weak electromagnetic fields. This effect originates from the diverging field-indu…
Current enhancement due to field-induced dark carrier multiplication in graphene
Roland Jago, Florian Wendler, Ermin Malic
We present a microscopic study on current generation in graphene in response to an electric field. While scattering is generally considered to reduce the current, we reveal that in…
Ultrafast Momentum Imaging of Pseudospin-Flip Excitations in Graphene
S. Aeschlimann, R. Krause, M. Chávez-Cervantes +5
The pseudospin of Dirac electrons in graphene manifests itself in a peculiar momentum anisotropy for photo-excited electron-hole pairs. These interband excitations are in fact forb…
Unconventional double-bended saturation of optical transmission in graphene due to many-particle interactions
Torben Winzer, Martin Mittendorff, Stephan Winnerl +3
We present a joint theory-experiment study on the transmission/absorption saturation after ultrafast pulse excitation in graphene. We reveal an unconventional double-bended saturat…
Graphene as Gain Medium for Broadband Lasers
Roland Jago, Torben Winzer, Andreas Knorr +1
In contrast to conventional structures, efficient non-radiative carrier recombination counteracts the appearance of optical gain in graphene. Based on a microscopic and fully quant…