Graphene as gain medium for broadband lasers
Artikel i vetenskaplig tidskrift, 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

Författare

Roland Jago

Chalmers, Teknisk fysik, Kondenserade materiens teori

T. Winzer

Technische Universität Berlin

A. Knorr

Technische Universität Berlin

Ermin Malic

Chalmers, Teknisk fysik, Kondenserade materiens teori

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 92 8 085407

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

Europeiska kommissionen (FP7), 2013-10-01 -- 2016-03-31.

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Nanoteknik

DOI

10.1103/PhysRevB.92.085407