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Thermodynamic balance in quantum dot lasers

Summers, Huw David, Thomson, John Duncan, Smowton, Peter Michael, 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: Physics and Astronomy
Uncontrolled Keywords: Optics; quantum optics; lasers
ISSN: 0268-1242
Last Modified: 04 Jun 2017 01:40
URI: http://orca.cf.ac.uk/id/eprint/1536

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