Ground state electroluminescence

Cirio, Mauro, De Liberato, Simone, Lambert, Neill and Nori, Franco (2016) Ground state electroluminescence. Physical Review Letters, 116 (11), [113601]. (doi:10.1103/PhysRevLett.116.113601).

Record type: Article

Abstract

Electroluminescence, the emission of light in the presence of an electric current, provides information on the allowed electronic transitions of a given system. It is commonly used to investigate the physics of strongly coupled light-matter systems, whose eigenfrequencies are split by the strong coupling with the photonic field of a cavity. Here we show that, together with the usual electroluminescence, systems in the ultrastrong light-matter coupling regime emit a uniquely quantum radiation when a flow of current is driven through them. While standard electroluminescence relies on the population of excited states followed by spontaneous emission, the process we describe herein extracts bound photons from the dressed ground state and it has peculiar features that unequivocally distinguish it from usual electroluminescence.

Text

1508.05849v1.pdf - Accepted Manuscript

Available under License University of Southampton Accepted Manuscript Licence.

Download (531kB)