Thermodynamic balance in quantum dot lasers

Summers, Huw David, Thomson, John Duncan, Smowton, Peter Michael ORCID: https://orcid.org/0000-0002-9105-4842, Blood, Peter and Hopkinson, M. 2001. Thermodynamic balance in quantum dot lasers. Semiconductor Science and Technology 16 (3) , pp. 140-143. 10.1088/0268-1242/16/3/303

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Abstract

The spontaneous emission and optical gain spectra from an InGaAs quantum dot laser have been independently measured under the same operating conditions. Using these spectra a combined probability-distribution function describing the electron occupancy in the conduction and valence bands has been experimentally determined. Comparison of this function with theoretical curves based on Fermi-Dirac statistics shows that for temperatures down to 100 K the carrier occupancy statistics are accurately described by thermal distributions. Measurements at 70 K show a breakdown of thermodynamic equilibrium indicated by non-thermal carrier distributions.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Uncontrolled Keywords:	Optics; quantum optics; lasers
ISSN:	0268-1242
Last Modified:	17 Oct 2022 08:56
URI:	https://orca.cardiff.ac.uk/id/eprint/1536

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