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The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

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Two-photon absorption in site-controlled InGaN/GaN quantum dots

Jarjour, A.F. and Taylor, R.A. and Martin, R.W. and Watson, I.M. (2005) Two-photon absorption in site-controlled InGaN/GaN quantum dots. Physica Status Solidi C, 2 (11). pp. 3843-3846. ISSN 1862-6351

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Abstract

We present micro-photoluminescence measurements on single site-controlled InGaN/GaN quantum dots using two-photon excitation Furthermore, measurements of photoluminescence excitation and time-resolved photoluminescence are also presented. We show that two-photon excitation results in total suppression of the emission from the underlying quantum well, to which the quantum dots are couple, and yet strong quantum dot emission. We attribute this effect to the enhancement of the two-photon absorption in the quantum dots as a result of the zero-dimensional confinement compared to that of the quantum wells.