Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene
نویسندگان
چکیده
منابع مشابه
Femtosecond population inversion and stimulated emission of dense Dirac fermions in graphene.
We show that strongly photoexcited graphene monolayers with 35 fs pulses quasi-instantaneously build up a broadband, inverted Dirac fermion population. Optical gain emerges and directly manifests itself via a negative conductivity at the near-infrared region for the first 200 fs, where stimulated emission completely compensates absorption loss in the graphene layer. Our experiment-theory compar...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2012
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.108.167401