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Controlling the properties of InGaAs quantum dots by selective-area epitaxy

Mokkapati, Sudha, Lever, P., Tan, H. H., Jagadish, C., McBean, K. E. and Phillips, M. R. 2005. Controlling the properties of InGaAs quantum dots by selective-area epitaxy. Applied Physics Letters 86 (11) , 113102. 10.1063/1.1875745

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Selective growth of InGaAsInGaAs quantum dots on GaAsGaAs is reported. It is demonstrated that selective-area epitaxy can be used for in-plane bandgap energy control of quantum dots. Atomic force microscopy and cathodoluminescence are used for characterization of the selectively grown dots. Our results show that the composition, size, and uniformity of dots are determined by the dimensions of the mask used for patterning the substrate. Properties of dots can be selectively tuned by varying the mask dimensions. A single-step growth of a thin InGaAsInGaAs quantum well and InGaAsInGaAs quantum dots on the same wafer is demonstrated. By using a single-step growth, dots luminescing at different wavelengths, in the range 1150–1230nm1150–1230nm, in different parts of the same wafer are achieved.

Item Type: Article
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Institute of Physics
ISSN: 0003-6951
Last Modified: 23 Jan 2020 04:18

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