Graphene as gain medium for broadband lasers
Journal article, 2015

Efficient nonradiative carrier recombination strongly counteracts the appearance of optical gain in graphene. Based on a microscopic and fully quantum-mechanical study of the coupled carrier, phonon, and photon dynamics in graphene, we present a strategy to obtain a long-lived gain: Integrating graphene into a high quality photonic crystal nanocavity and applying a high-dielectric substrate suppresses the nonradiative recombination channels and gives rise to pronounced coherent light emission. This suggests the design of graphene-based laser devices covering a broad spectral range.



photonic crystal

carrier multiplication

light-matter interaction



Roland Jago

Chalmers, Applied Physics, Condensed Matter Theory

T. Winzer

Technische Universität Berlin

A. Knorr

Technische Universität Berlin

Ermin Malic

Chalmers, Applied Physics, Condensed Matter Theory

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 92 8 085407

Graphene-Based Revolutions in ICT And Beyond (Graphene Flagship)

European Commission (FP7), 2013-10-01 -- 2016-03-31.

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Nano Technology



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Latest update

3/1/2018 1