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Microscopic View on the Ultrafast Photoluminescence from Photoexcited Graphene

T. Winzer ; R. Ciesielski ; M. Handloser ; A. Comin ; A. Hartschuh ; Ermin Malic (Institutionen för teknisk fysik, Kondenserade materiens teori)
Nano letters (1530-6984). Vol. 15 (2015), 2, p. 1141-1145.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: graphene, coherent and incoherent photoluminescence, carrier dynamics, carrier-carrier scattering, carrier-phonon scattering

Denna post skapades 2015-03-30.
CPL Pubid: 214491


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Institutioner (Chalmers)

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



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Denna publikation är ett resultat av följande projekt:

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