Enhancement of spin polarization in asymmetric double quantum dot configurations involving diluted magnetic semiconductors

Sang Hoon Lee, M. Dobrowolska, J. K. Furdyna

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

Abstract

We have performed polarization-selective magneto-photoluminescence (PL) experiment in the Faraday geometry at 1.5 K on a series of self-assembled quantum dots (QDs) in the form of single QD layer and double QD layer systems. The intensities of the PL peaks from two QD layers exhibited significant differences for the two circular polarizations when a magnetic field was applied. This has led to a large difference in the degree of spin polarization between the CdSe and CdZnSe QDs in the double layer system, in contrast to the behavior shown by the quantum dots in the single-layer CdSe or CdZnSe QD structures, both of which show nearly identical dependence of the PL polarization on the field. The observed behavior was interpreted in terms of anti-parallel spin interaction between carriers localized in pairs of QDs that are electronically coupled. This effect of spin interaction was enhanced in the magnetic semiconductor double QD structure in which non-magnetic CdZnSe QD layer replaced by magnetic CdZnMnSe QD layer.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages703-704
Number of pages2
Volume772
DOIs
Publication statusPublished - 2005 Jun 30
EventPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 - Flagstaff, AZ, United States
Duration: 2004 Jul 262004 Jul 30

Other

OtherPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27
CountryUnited States
CityFlagstaff, AZ
Period04/7/2604/7/30

Fingerprint

quantum dots
augmentation
polarization
configurations
photoluminescence
circular polarization
interactions
geometry
magnetic fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Enhancement of spin polarization in asymmetric double quantum dot configurations involving diluted magnetic semiconductors. / Lee, Sang Hoon; Dobrowolska, M.; Furdyna, J. K.

AIP Conference Proceedings. Vol. 772 2005. p. 703-704.

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

Lee, SH, Dobrowolska, M & Furdyna, JK 2005, Enhancement of spin polarization in asymmetric double quantum dot configurations involving diluted magnetic semiconductors. in AIP Conference Proceedings. vol. 772, pp. 703-704, PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27, Flagstaff, AZ, United States, 04/7/26. https://doi.org/10.1063/1.1994300
Lee, Sang Hoon ; Dobrowolska, M. ; Furdyna, J. K. / Enhancement of spin polarization in asymmetric double quantum dot configurations involving diluted magnetic semiconductors. AIP Conference Proceedings. Vol. 772 2005. pp. 703-704
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