Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene
We study the broadband optical conductivity and ultrafast carrier dynamics of epitaxial graphene in the few-layer limit. Equilibrium spectra of nominally buffer, monolayer, and multilayer graphene exhibit significant terahertz and near-infrared absorption, consistent with a model of intra- and interband transitions in a dense Dirac electron plasma. Non-equilibrium terahertz transmission changes after photoexcitation are shown to be dominated by excess hole carriers, with a 1.2-ps mono-exponential decay that refects the minority-carrier recombination time.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Materials Sciences Division
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 974432
- Report Number(s):
- LBNL-1715E; APPLAB; TRN: US201007%%710
- Journal Information:
- Applied Physics Letters, Vol. 94; Related Information: Journal Publication Date: 2009; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ultrafast terahertz Faraday rotation in graphene
Ultrafast manipulation of topologically enhanced surface transport driven by mid-infrared and terahertz pulses in Bi2Se3
Electronic cooling via interlayer Coulomb coupling in multilayer epitaxial graphene
Journal Article
·
Sun Dec 07 00:00:00 EST 2014
· Journal of Applied Physics
·
OSTI ID:974432
+2 more
Ultrafast manipulation of topologically enhanced surface transport driven by mid-infrared and terahertz pulses in Bi2Se3
Journal Article
·
Tue Feb 05 00:00:00 EST 2019
· Nature Communications
·
OSTI ID:974432
+12 more
Electronic cooling via interlayer Coulomb coupling in multilayer epitaxial graphene
Journal Article
·
Thu Sep 24 00:00:00 EDT 2015
· Nature Communications
·
OSTI ID:974432
+7 more