Microscopic View on the Ultrafast Photoluminescence from Photoexcited Graphene

被引：22

作者：

Winzer, Torben ^{[1
]}

Ciesielski, Richard ^{[2
,3
]}

Handloser, Matthias ^{[2
,3
]}

Comin, Alberto ^{[2
,3
]}

Hartschuh, Achim ^{[2
,3
]}

Malic, Ermin ^{[4
]}

机构：

[1] Tech Univ Berlin, Inst Theoret Phys, D-10623 Berlin, Germany

[2] Univ Munich, Dept Chem, D-81377 Munich, Germany

[3] Univ Munich, CeNS, D-81377 Munich, Germany

[4] Chalmers Univ Technol, Dept Appl Phys, SE-41296 Gothenburg, Sweden

来源：

NANO LETTERS | 2015年 / 15卷 / 02期

基金：

瑞典研究理事会;

关键词：

graphene; coherent and incoherent photoluminescence; carrier dynamics; carrier-carrier scattering; carrier-phonon scattering; CARRIER MULTIPLICATION; RELAXATION;

D O I：

10.1021/nl504176z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：1141 / 1145

页数：5

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