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Fermi-dirac and random carrier distributions in quantum dot lasers

Hutchings, Matthew, O'Driscoll, I., Smowton, Peter Michael ORCID: and Blood, Peter 2014. Fermi-dirac and random carrier distributions in quantum dot lasers. Applied Physics Letters 104 (3) , 031103. 10.1063/1.4862813

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Using experimental gain and emission measurements as functions of temperature, a method is described to characterise the carrier distribution of radiative states in a quantum dot (QD) laser structure in terms of a temperature. This method is independent of the form of the inhomogeneous dot distribution. A thermal distribution at the lattice temperature is found between 200 and 300 K. Below 200 K the characteristic temperature exceeds the lattice temperature and the distribution becomes random below about 60 K. This enables the temperature range for which Fermi-Dirac statistics are applicable in QD laser threshold calculations to be identified.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Quantum dots; excited states; current density; wetting; emission spectra.
Additional Information: Pdf uploaded in accordance with publisher's policy at (accessed 15/7/2014)
Publisher: American Institute of Physics
ISSN: 0003-6951
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 1 January 2014
Last Modified: 06 Nov 2023 23:47

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