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.

nanocavity

Physics

photonic crystal

carrier multiplication

light-matter interaction

photodetector

Author

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

DOI

10.1103/PhysRevB.92.085407

More information

Latest update

3/1/2018 1