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

Journal Article · Mon Feb 07 00:00:00 EST 2000 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.125866· OSTI ID:20215268

Htoon, H ^[1]; Keto, J W ^[1]; Baklenov, O ^[2]; Holmes, Jr, A L ^[2]; Shih, C K ^[1]

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1. Department of Physics, University of Texas at Austin, Austin, Texas 78712 (United States)
2. Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78712 (United States)

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. (c) 2000 American Institute of Physics.

• OSTI ID: 20215268
• Journal Information: Applied Physics Letters, Vol. 76, Issue 6; Other Information: PBD: 7 Feb 2000; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PHOTOLUMINESCENCE
STARK EFFECT
INFRARED SPECTRA
ELECTRIC FIELDS
GALLIUM ARSENIDES
INDIUM ARSENIDES
ALUMINIUM ARSENIDES
SEMICONDUCTOR JUNCTIONS
RED SHIFT
EXPERIMENTAL DATA