Microscopic View on the Ultrafast Photoluminescence from Photoexcited Graphene
Artikel i vetenskaplig tidskrift, 2015

We present a joint theory-experiment study on ultrafast photoluminescence from photoexcited graphene. On the basis of a microscopic theory, we reveal two distinct mechanisms behind the occurring photoluminescence: besides the well-known incoherent contribution driven by nonequilibrium carrier occupations, we found a coherent part that spectrally shifts with the excitation energy. In our experiments, we demonstrate for the first time the predicted appearance and spectral shift of the coherent photoluminescence.

coherent and incoherent photoluminescence

carrier-phonon scattering


carrier dynamics

carrier-carrier scattering


T. Winzer

Technische Universität Berlin

R. Ciesielski

Ludwig-Maximilians-Universität München

M. Handloser

Ludwig-Maximilians-Universität München

A. Comin

Ludwig-Maximilians-Universität München

A. Hartschuh

Ludwig-Maximilians-Universität München

Ermin Malic

Chalmers, Teknisk fysik, Kondenserade materiens teori

Nano Letters

1530-6984 (ISSN) 1530-6992 (eISSN)

Vol. 15 1141-1145