Microscopic View on the Ultrafast Photoluminescence from Photoexcited Graphene
Journal article, 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

graphene

carrier dynamics

carrier-carrier scattering

Author

T. Winzer

Technische Universität Berlin

R. Ciesielski

Ludwig Maximilian University of Munich (LMU)

M. Handloser

Ludwig Maximilian University of Munich (LMU)

A. Comin

Ludwig Maximilian University of Munich (LMU)

A. Hartschuh

Ludwig Maximilian University of Munich (LMU)

Ermin Malic

Chalmers, Applied Physics, Condensed Matter Theory

Nano Letters

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

Vol. 15 2 1141-1145

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (EC) (EC/FP7/604391), 2013-10-01 -- 2016-03-31.

Subject Categories

Chemical Sciences

DOI

10.1021/nl504176z

More information

Latest update

3/29/2018