Recombination channels in optically excited graphene
Artikel i vetenskaplig tidskrift, 2015

We present a theoretical study on the efficiency of non-radiative recombination channels in optically excited graphene on a substrate. We find that depending on the strength of the excitation pulse and the dielectric constant of the applied substrate, either Auger or phonon-induced recombination prevails. The favorable conditions for Auger recombination are (i) strong excitation regime providing a large number of scattering partners and (ii) low-dielectric substrates, which only weakly screen the Coulomb interaction. The gained insights are important for achieving a population inversion in graphene that is temporally limited by the presented recombination channels.

graphene

Auger scattering

recombination channels

carrier dynamics

carrier-phonon scattering

Författare

Roland Jago

Chalmers, Teknisk fysik, Kondenserade materiens teori

T. Winzer

Technische Universität Berlin

Ermin Malic

Chalmers, Teknisk fysik, Kondenserade materiens teori

Physica Status Solidi (B): Basic Research

0370-1972 (ISSN) 1521-3951 (eISSN)

Vol. 252 11 2456-2460

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

Europeiska kommissionen (FP7), 2013-10-01 -- 2016-03-31.

Ämneskategorier

Fysik

DOI

10.1002/pssb.201552425

Mer information

Senast uppdaterat

2018-03-01