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Quantum Dot Necklaces and other QD Chains - For the past two years, the molecular-beam-epitaxy (MBE) group at the University of Arkansas has developed a novel growth procedure to laterally line up self-assembled InGaAs quantum dots (QDs).
Quantum Dot Necklaces and other QD Chains

 

NewswireToday - /newswire/ - Honolulu, HI, United States, 2006/04/12 - For the past two years, the molecular-beam-epitaxy (MBE) group at the University of Arkansas has developed a novel growth procedure to laterally line up self-assembled InGaAs quantum dots (QDs)..

   
 
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The group's ability to control the size, composition and position of the QDs during the growth process opens the possibility of engineering some interesting electronics and optoelectronics device structures. In a new report they demonstrate a unique approach that uses QDs as its building elements. The experimental results suggest that this approach has the potential to be used to fabricate single QD chains or necklaces or almost any pattern.

Generally, the capability to spatially localize the self-assembled QDs will benefit all the QD-based electronic and optical devices, including QD lasers and detectors. Especially for QD-based optical memory devices, one needs to have precise control of the QD position for information addressing. Another possible application would be in Gain Coupled Distributed Feedback QD Lasers, where it is needed to encourage the formation of InGaAs QDs into designed areas.

Professors Gregory Salamo and Zhiming Wang, who lead the MBE group, together with first author Jihoon Lee and co-authors Baolai Liang, William Black, Vasyl Kunets, and Yuriy Mazur report their most recent finding on QD chains in an article titled "Selective growth of InGaAs/GaAs quantum dot chains on pre-patterned GaAs(100)" published on April 7, 2006 in the online edition of Nanotechnology.

The full article can be found on the Nanowerk website.

 
 
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Quantum Dot Necklaces and other QD Chains

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Publisher Contact: Michael Berger - Nanowerk.com 
1-808-741-1739 michael[.]nanowerk.com
 
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