Electronic structure of vertically coupled multilayer semiconductor quantum dots in a magnetic field

Yi-Ming Li, Hsiao Mei Lu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper coupling effects and energy spectra are investigated for vertically stacked InAs/GaAs quantum dots under magnetic fields. The Hamiltonian considers here the position- and energy-dependent quasi-particle effective mass approximation and Lande factor, the finite hard wall confinement potential, and the Ben Daniel-Duke boundary conditions. A nonlinear iterative method is applied to solve the three-dimensional problem. For small quantum dots the transition energy is dominated by the number of stacked layers. The inter-distance d between layers plays a crucial role in the tunable states of the dots. For d=1 nm, it is found that there is about 25% variation in ground state energy at zero magnetic field. We observed that the dependence of magnetic fields on the electron transition energy is depressed when the number of vertically coupled layers is increased. This study is constructive for exploring the magneto-optical phenomena and quantum optical structures.

Original languageEnglish
Title of host publication2003 3rd IEEE Conference on Nanotechnology, IEEE-NANO 2003 - Proceedings
PublisherIEEE Computer Society
Pages99-102
Number of pages4
ISBN (Electronic)0780379764
DOIs
StatePublished - 15 Sep 2003
Event2003 3rd IEEE Conference on Nanotechnology, IEEE-NANO 2003 - San Francisco, United States
Duration: 12 Aug 200314 Aug 2003

Publication series

NameProceedings of the IEEE Conference on Nanotechnology
Volume1
ISSN (Print)1944-9399
ISSN (Electronic)1944-9380

Conference

Conference2003 3rd IEEE Conference on Nanotechnology, IEEE-NANO 2003
CountryUnited States
CitySan Francisco
Period12/08/0314/08/03

Keywords

  • Boundary conditions
  • Couplings
  • Effective mass
  • Gallium arsenide
  • Iterative methods
  • Magnetic confinement
  • Magnetic fields
  • Magnetic multilayers
  • Quantum dots
  • Stationary state

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