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SUMMARY:Models for Quantum Dots Accounting for Coupled Effects and Nonline
 ar Strain - Roderick Melnik\, CRC in Mathematical Modelling\, Wilfrid Laur
 ier University\, Waterloo\, Department of Physics\, University of Waterloo
 \, ON\, Canada\, N2L 3C5
DTSTART:20070427T143000Z
DTEND:20070427T153000Z
UID:TALK7144@talks.cam.ac.uk
CONTACT:spl37
DESCRIPTION:Low-dimensional semiconductor nanostructures (LDSNs) are recei
 ving increasing\nattention as key components of semiconductor lasers\, sem
 iconductor optical ampli¯ers\,\nand other optoelectronic devices. Quantum
  dots (QDs) - LDSNs in which the motion\nof electrons is con¯ned from all
  three spatial dimensions - can be used as biological\ntags in clinical re
 search and DNA analysis\, while the idea of using a spin con¯ned to\na QD
  as a qubit promises imminent breakthrough in quantum information process-
 \ning. Despite a wide range of current and potential applications\, optoel
 ectromechanical\nproperties of QDs are still frequently analyzed with simp
 li¯ed mathematical models\,\nincapable to account correctly for strain\, 
 piezoelectric coupling\, and other important\ne®ects. In this talk I will
  provide a survey of the existing models for bandstructure\ncalculations f
 ocusing on coupled and nonlinear e®ects and their incorporation in new\nm
 odels developed in our group for the analysis of properties of QDs. Severa
 l numerical\nexamples will be given to illustrate the theory.
LOCATION: IRC in Superconductivity Seminar room
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