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This paper examines the influence of rapid thermal annealing on the photoluminescence spectra of self-assembled InAs∕InP(001) quantum dots capped with 760nm InP deposited at a reduced temperature. The capping layer contained a large concentration of point defects that can promote interdiffusion upon annealing. The onset temperature for measurable blueshift in the emission spectra was found to be ∼600°C whereas shifts of 270meV were obtained after annealing at 750°C for 300s. Gradual etching of the InP capping layer enabled to progressively quench energy shifts upon annealing, a promising result for spatially selective emission tuning.
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Dion et al. (2006) studied this question.
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