Cross-sectional nanophotoluminescence studies of Stark effects in self-assembled quantum dots

By using a cross-sectional geometry, we show the capability to perform single-dot spectroscopy in self-assembled quantum dots using far-field optics. By using this method, we study the quantum-confined Stark effect in self-assembled quantum dots. For single-stack quantum dots (QDs), we find that the...

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Bibliographic Details
Published in:Applied physics letters 2000-02, Vol.76 (6), p.700-702
Main Authors: Htoon, H., Keto, J. W., Baklenov, O., Holmes, A. L., Shih, C. K.
Format: Article
Language:English
Subjects:
ALUMINIUM ARSENIDES
ELECTRIC FIELDS
EXPERIMENTAL DATA
GALLIUM ARSENIDES
INDIUM ARSENIDES
INFRARED SPECTRA
MATERIALS SCIENCE
PHOTOLUMINESCENCE
RED SHIFT
SEMICONDUCTOR JUNCTIONS
STARK EFFECT
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Summary:By using a cross-sectional geometry, we show the capability to perform single-dot spectroscopy in self-assembled quantum dots using far-field optics. By using this method, we study the quantum-confined Stark effect in self-assembled quantum dots. For single-stack quantum dots (QDs), we find that the spectra are redshifted with an increase in electric field. For vertically coupled double-stack quantum dots, while most of the QDs are redshifted, some QDs show blueshifted spectra, which can be interpreted as an evidence of coupled QD molecules.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.125866