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Models for Quantum Dots Accounting for Coupled Effects and Nonlinear Strain

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  • UserRoderick Melnik, CRC in Mathematical Modelling, Wilfrid Laurier University, Waterloo, Department of Physics, University of Waterloo, ON, Canada, N2L 3C5
  • ClockFriday 27 April 2007, 15:30-16:30
  • House IRC in Superconductivity Seminar room.

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Low-dimensional semiconductor nanostructures (LDSNs) are receiving increasing attention as key components of semiconductor lasers, semiconductor optical ampli¯ers, and other optoelectronic devices. Quantum dots (QDs) – LDS Ns in which the motion of electrons is con¯ned from all three spatial dimensions – can be used as biological tags in clinical research and DNA analysis, while the idea of using a spin con¯ned to a QD as a qubit promises imminent breakthrough in quantum information process- ing. Despite a wide range of current and potential applications, optoelectromechanical properties of QDs are still frequently analyzed with simpli¯ed mathematical models, incapable to account correctly for strain, piezoelectric coupling, and other important e®ects. In this talk I will provide a survey of the existing models for bandstructure calculations focusing on coupled and nonlinear e®ects and their incorporation in new models developed in our group for the analysis of properties of QDs. Several numerical examples will be given to illustrate the theory.

This talk is part of the Nanoscience Centre Seminar Series series.

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