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

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

9/15/2020