Title of article
Investigation of coupling in naturally occurring GaAs quantum dots
Author/Authors
P.W. Kolb، نويسنده , , H.D. Drew، نويسنده ,
Issue Information
ماهنامه با شماره پیاپی سال 2007
Pages
6
From page
594
To page
599
Abstract
We report on the photoluminescence (PL) imaging of GaAs quantum dots (QDs) formed by islands of quantized thicknesses in a 2 nm thick Al0.3Ga0.7As/GaAs/Al0.3Ga0.7As quantum well (QW) by means of near-field scanning optical microscopy. Discrete spectra associated with the QDs are observed and studied. Individual QDs are imaged with a resolution of 150 nm. Energy degeneracy which is sometimes observed between nearby QDs suggests the possibility of quantum mechanically coupled dots. Constraints on the observation of coupling are discussed.
Keywords
Quantum dot , Coupling , Near field , Photoluminescence
Journal title
Physica E Low-dimensional Systems and Nanostructures
Serial Year
2007
Journal title
Physica E Low-dimensional Systems and Nanostructures
Record number
1046886
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