Electrically pumped graphene-based Landau-level laser
Journal article, 2018

Graphene exhibits a nonequidistant Landau quantization with tunable Landau-level (LL) transitions in the technologically desired terahertz spectral range. Here, we present a strategy for an electrically driven terahertz laser based on Landau-quantized graphene as the gain medium. Performing microscopic modeling of the coupled electron, phonon, and photon dynamics in such a laser, we reveal that an inter-LL population inversion can be achieved resulting in the emission of coherent terahertz radiation. The presented paper provides a concrete recipe for the experimental realization of tunable graphene-based terahertz laser systems.

Author

Samuel Brem

Chalmers, Physics, Condensed Matter Theory

Florian Wendler

Chalmers, Physics, Condensed Matter Theory

Stephan Winnerl

Helmholtz-Zentrum Dresden-Rossendorf

Ermin Malic

Chalmers, Physics, Condensed Matter Theory

Physical Review Materials

Vol. 2 3 034002

Subject Categories

Atom and Molecular Physics and Optics

Other Physics Topics

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1103/PhysRevMaterials.2.034002

More information

Latest update

1/24/2019