Electrically pumped graphene-based Landau-level laser
Electrically pumped graphene-based Landau-level laser
Brem, S.; Wendler, F.; Winnerl, S.; Malic, E.
Abstract
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.
Keywords: graphene; Landau quantization; laser; Landau-level laser
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Physical Review Materials 2(2018), 034002
DOI: 10.1103/PhysRevMaterials.2.034002
Cited 5 times in Scopus
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Permalink: https://www.hzdr.de/publications/Publ-27219