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Radiative recombination rate measurement by the optically pumped variable stripe length method

Thomas, Robert, Smowton, Peter M. ORCID: and Blood, Peter 2015. Radiative recombination rate measurement by the optically pumped variable stripe length method. Optics Express 23 (3) , pp. 3308-3315. 10.1364/OE.23.003308

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Using the optically pumped variable stripe length technique we demonstrate that, through calibration of measured spontaneous emission spectra, it is possible to determine the total radiative recombination rate for a gain material as a function of the intrinsic quasi-Fermi level separation. Specifically we compare the room temperature optical characteristics of a self-assembled InP/GaInP quantum dot material measured using both optical and electrical pumping. The comparison reveals good agreement between gain and emission spectra measured with the two techniques, for the same inversion, from which we conclude that the carrier distributions in each case are equivalent. The results demonstrate that the optically pumped experiment can provide a good measure of the overall radiative efficiency.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Optical Society of America
ISSN: 1094-4087
Funders: EPSRC
Date of First Compliant Deposit: 6 May 2020
Date of Acceptance: 16 December 2014
Last Modified: 17 May 2023 08:10

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