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Recombination channels in optically excited graphene

Roland Jago (Institutionen för teknisk fysik, Kondenserade materiens teori) ; T. Winzer ; Ermin Malic (Institutionen för teknisk fysik, Kondenserade materiens teori)
Physica status solidi. B, Basic research (0370-1972). Vol. 252 (2015), 11, p. 2456-2460.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Auger scattering, carrier dynamics, carrier-phonon scattering, graphene, recombination channels



Denna post skapades 2016-01-15. Senast ändrad 2016-01-29.
CPL Pubid: 230767

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Fysik

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


Graphene-Based Revolutions in ICT And Beyond (GRAPHENE) (EC/FP7/604391)