Carrier Dynamics in Graphene: Ultrafast Many‐Particle Phenomena. Issue 11 (17th July 2017)

• Record Type: Journal Article
• Authors: Malic, E.; Winzer, T.; Wendler, F.; Brem, S.; Jago, R.; Knorr, A.; Mittendorff, M.; König‐Otto, J. C.; Plötzing, T.; Neumaier, D.; Schneider, H.; Helm, M.; Winnerl, S.
• Other Names: Seyller Thomas guestEditor.
• Is Part Of: Annalen der Physik. Volume 529:Issue 11(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-07-17
• Subjects: graphene -- carrier dynamics -- carrier multiplication -- population inversion; Physics -- Periodicals; Chemistry -- Periodicals; 530.05
• DOI: 10.1002/andp.201700038
• Languages: English
• ISSNs: 0003-3804

Abstract

Abstract: 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 relaxation channels. In particular, Auger scattering bridging the valence and the conduction band changes the number of charge carriers and gives rise to a significant carrier multiplication ‐ an ultrafast many‐particle phenomenon that is promising for the design of highly efficient photodetectors. Furthermore, the vanishing density of states at the Dirac point combined with ultrafast phonon‐induced intraband scattering results in an accumulation of carriers and a population inversion suggesting the design of graphene‐based terahertz lasers. Here, we review our work on the ultrafast carrier dynamics in graphene and Landau‐quantized graphene is presented providing a microscopic view on the appearance of carrier multiplication and population inversion. Abstract : The feature article presents a review of the recent theoretical work, providing a microscopic view of the time‐ and energy‐resolved dynamics of optically excited carriers in graphene. The remarkable gapless and linear band structure of graphene opens up new relaxation channels, giving rise to fascinating ultrafast phenomena. In this work, the authors focus on the appearance of technologially relevant carrier multiplication and population inversion.