Three-dimensional calculation of electronic structures in semiconductor quantum ring based artificial molecules

Yi-Ming Li*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We theoretically investigate the energy spectra of vertically coupled quantum rings (VCQRs) with a three-dimensional (3D) model under applied magnetic fields. Two interesting configurations, the disk- and the conical-shaped (DI and CO) small VCQRs are explored. The electron and hole energies are significantly dominated by the interdistance d which plays a crucial role in the tunable states of structures. For electrons, the energy state is with a nonperiodical transition among the lowest electron. For holes, it does also demonstrate the same behavior. The energy band gap of VCQRs oscillates non periodically between the lowest electron and holes states as a function of external magnetic fields. In addition, the oscillation is controlled by not only the topology of VCQR and the inner (and base) radius but also the variation of d. This investigation is constructive in studying the magneto-optical phenomena of the nanoscale semiconductor artificial molecules, in particular for the laser device applications.

Original languageEnglish
Title of host publication2004 4th IEEE Conference on Nanotechnology
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages474-476
Number of pages3
ISBN (Print)0780385365
DOIs
StatePublished - 16 Aug 2004
Event2004 4th IEEE Conference on Nanotechnology - Munich, Germany
Duration: 16 Aug 200419 Aug 2004

Publication series

Name2004 4th IEEE Conference on Nanotechnology

Conference

Conference2004 4th IEEE Conference on Nanotechnology
CountryGermany
CityMunich
Period16/08/0419/08/04

Keywords

  • 3D model
  • Electron and hole energies
  • InAs/GaAs quantum rings
  • Magnetic field effects
  • Narrow gap quantum ring
  • Nonperiodical oscillation
  • Numerical simulation
  • Semiconductor artificial molecules
  • Stacked nanostructures
  • Vertically coupled quantum rings

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  • Cite this

    Li, Y-M. (2004). Three-dimensional calculation of electronic structures in semiconductor quantum ring based artificial molecules. In 2004 4th IEEE Conference on Nanotechnology (pp. 474-476). (2004 4th IEEE Conference on Nanotechnology). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NANO.2004.1392390