Growth and characterization of cooperative quantum dot chains in quaternary InAsSbP material system

The cooperative quantum dot chains (CQDCs) are grown from In-As-Sb-P quaternary liquid phase on InAs(100) substrate with a deviation of surface orientation from (100) of about 0.3° along [010] direction. The wet chemical etching is utilized to create an additional artificial disorientation of the su...

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Bibliographic Details
Published inAIP advances Vol. 3; no. 5; p. 052108
Main Authors Gambaryan, K. M., Aroutiounian, V. M.
Format Journal Article
LanguageEnglish
Published AIP Publishing LLC 01.05.2013
Subjects
Atomic force microscopy
Chemical etching
Deviation
Disorientation
Doppler effect
Orientation
Quantum dots
Red shift
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Summary:The cooperative quantum dot chains (CQDCs) are grown from In-As-Sb-P quaternary liquid phase on InAs(100) substrate with a deviation of surface orientation from (100) of about 0.3° along [010] direction. The wet chemical etching is utilized to create an additional artificial disorientation of the substrate. AFM investigations show that CQDCs mainly consist of central coupled InAsSb quantum dot (QD) sub-chains surrounded by InAsP-leaf chains. Cooperative chains have a ∼120 nm total width, over 5 μm length and directed along [010]. The separation between QDs within sub-chains is about 40 nm. The red shift of CQDCs’ absorption edge is detected.
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ISSN:2158-3226
2158-3226
DOI:10.1063/1.4804547