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Microscopic view on the ultrafast photoluminescence from photo-excited graphene
Torben Winzer, Richard Ciesielski, Matthias Handloser +3
We present a joint theory-experiment study on ultrafast photoluminescence from photoexcited graphene. Based on a microscopic theory, we reveal two distinct mechanisms behind the oc…
Carrier multiplication in graphene under Landau quantization
Florian Wendler, Andreas Knorr, Ermin Malic
Carrier multiplication is a many-particle process giving rise to the generation of multiple electron-hole pairs. This process holds the potential to increase the power conversion e…
Intrinsic Exciton Linewidth in Monolayer Transition Metal Dichalcogenides
Galan Moody, Chandriker Kavir Dass, Kai Hao +10
Monolayer transition metal dichalcogenides feature Coulomb-bound electron-hole pairs (excitons) with exceptionally large binding energy and coupled spin and valley degrees of freed…
Population inversion in Landau-quantized graphene
Florian Wendler, Ermin Malic
Landau level lasers have the advantage of tunability of the laser frequency by means of the external magnetic field. The crucial prerequisite of such a laser is a population invers…
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…
Universal non-resonant absorption in carbon nanotubes
Fabien Vialla, Ermin Malic, Benjamin Langlois +6
Photoluminescence excitation measurements in semi-conducting carbon nanotubes show a systematic non-resonant contribution between the well known excitonic resonances. Using a globa…