Pith. sign in

REVIEW

Femtosecond Population Inversion and Stimulated Emission of Dense Dirac Fermions in Graphene

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1112.2204 v2 pith:AA2DZSWH submitted 2011-12-09 cond-mat.mes-hall cond-mat.mtrl-sci

T. Li , L. Luo , M. Hupalo , J. Zhang , M. C. Tringides , J. Schmalian , J. Wang This is my paper · ORCID
classification cond-mat.mes-hallcond-mat.mtrl-sci
keywords grapheneabsorptiondensediracemissiongainopticalpopulation
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

We show that strongly photoexcited graphene monolayers with 35fs pulses quasi-instantaneously build up a broadband, inverted Dirac fermion population. Optical gain emerges and directly manifests itself via a negative optical conductivity for the first 200fs, where stimulated emission completely compensates absorption loss in the graphene layer. Our experiment-theory comparison with two distinct electron and hole chemical potentials reproduce absorption saturation and gain at 40fs, revealing, particularly, the evolution of the transient state from a hot classical gas to a dense quantum fluid with increasing the photoexcitation.

Discussion (0). Continue with ORCID to comment.

Pith tools