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Study of dual-valley transport across a multiquantum barrier to enhance carrier confinement

Brown, M. R, Teng, K. S, Kestle, A., Smowton, Peter Michael, Blood, Peter, Mawby, P. A. and Wilks, S. P. 2004. Study of dual-valley transport across a multiquantum barrier to enhance carrier confinement. Applied Surface Science 234 (1-4) , pp. 434-438. 10.1016/j.apsusc.2004.05.074

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Abstract

Red-emitting quantum well (QW) 630 nm laser diodes have many potential applications in industry and medicine. However, manufacture of such short wavelength lasers is impeded by severe electron leakage from the active region, which is predominantly attributed to loss of thermally activated electrons, via the inherently low conduction band offsets and possible inter-valley transfer to the lower energy X-band minima. To combat the high leakage current in such devices, we have implemented a multiquantum barrier (MQB) into the p-type cladding region of the device, and theoretically optimised the structure to reduce X-band transfer and predict effective enhancement to the intrinsic barrier height.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Multiquantum barrier; Inter-valley transport; AlGaInP laser diodes; Superlattice; Tunnelling
Publisher: Elsevier
ISSN: 0169-4332
Last Modified: 04 Jun 2017 06:24
URI: http://orca.cf.ac.uk/id/eprint/59527

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