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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Influence of surface-related states on the carrier dynamics in (Ga,In)N/GaN single quantum wells

Othonos, A. and Itskos, G. and Bradley, D.D.C. and Dawson, M.D. and Watson, I.M. (2009) Influence of surface-related states on the carrier dynamics in (Ga,In)N/GaN single quantum wells. Applied Physics Letters, 94 (20). 203102-1-203102-3. ISSN 0003-6951

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Abstract

We report on the influence of surface-related states on the relaxation of carriers within single (Ga,In)N/GaN quantum wells. Two identical samples that differ only in the thickness of the top GaN cap layer were studied. Photoluminescence and pump-probe measurements reveal significant variations in the quantum well integrated emission and the carrier relaxation decay times in the two samples, when probing both the ground and excited states of the wells. The variations are attributed to the presence of an efficient nonradiative relaxation channel associated with the proximity of the quantum well excitations to the surface-related states in the thin-cap sample.