Emission from neutral and charged excitons in a single quantum dot in a magnetic field

C. Schulhauser, R. J. Warburton, A. Högele, A. O. Govorov, K. Karrai, J. M. Garcia, B. D. Gerardot, P. M. Petroff

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Abstract

We report on optical spectroscopy of self-assembled InAs quantum dots in a magnetic field. We describe how we measure the emission characteristics of a single quantum dot (QD) in high magnetic fields at low temperature using a miniature, fiber-based confocal microscope. Example results are presented on a QD whose charge can be controlled using a field-effect device. For the uncharged, singly and doubly charged excitons we find a diamagnetism and the spin Zeeman effect. In contrast, for the triply-charged exciton we find a fundamentally different behavior. Anti-crossings in magnetic field imply that confined states of the QD are hybridized with Landau-like levels associated with the two-dimensional continuum. © 2003 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)184-188
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume21
Issue number2-4
DOIs
Publication statusPublished - Mar 2004
EventProceedings of the Eleventh International Conference on Modulation (MSS11) - Nara, Japan
Duration: 14 Jul 200318 Jul 2003

Keywords

  • Magnetic properties
  • Photoluminescence
  • Quantum dot
  • Spectroscopy

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    Schulhauser, C., Warburton, R. J., Högele, A., Govorov, A. O., Karrai, K., Garcia, J. M., Gerardot, B. D., & Petroff, P. M. (2004). Emission from neutral and charged excitons in a single quantum dot in a magnetic field. Physica E: Low-Dimensional Systems and Nanostructures, 21(2-4), 184-188. https://doi.org/10.1016/j.physe.2003.11.009