Optical properties of II-VI-based magnetic semiconductor self-assembled quantum dots

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

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

Abstract

We have studies magneto-optical properties of self-assembled quantum dot (QD) structures involving diluted magnetic semiconductors (DMSs) in various geometries. The observation of lower PL energy and smaller Zeeman shift in multi-layer QD system than in single layer QD structure suggests that there exists electronic coupling between the QD layers in multi-layer geometry. The double layer QD structure consisting of CdSe QDs and CdMnSe QDs exhibits a striking decrease of the PL intensity as a function of B. This phenomenon occurs due to the carrier tunnelling between non-DMS QDs and DMS QDs. In polarization-selective PL measurement of asymmetric double layer QD structures consisting of CdSe QD and CdZnMnSe QD layers, a significant enhancement of the degree of σ - circular polarization emitted by the non-magnetic CdSe QDs is observed, as compared to that observed in CdSe QDs without the influence of neighboring CdZnMnSe QDs, This behavior can be understood in terms of antiferromagnetic interaction between carrier spins localized in pairs of CdSe and CdZnMnSe QDs that are electronically coupled.

Original languageEnglish
Title of host publicationInstitute of Physics Conference Series
EditorsJ.-C. Woo, H. Hasegawa, Y.-S. Kwon, T. Yao, K.-H. Yoo
Pages455-462
Number of pages8
Volume184
Publication statusPublished - 2005
Event31st International Symposium of Compound Semiconductors 2004 - Seoul, Korea, Republic of
Duration: 2004 Sep 122004 Dec 16

Other

Other31st International Symposium of Compound Semiconductors 2004
CountryKorea, Republic of
CitySeoul
Period04/9/1204/12/16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Lee, S. H., Furdyna, J. K., & Dobrowolska, M. (2005). Optical properties of II-VI-based magnetic semiconductor self-assembled quantum dots. In J-C. Woo, H. Hasegawa, Y-S. Kwon, T. Yao, & K-H. Yoo (Eds.), Institute of Physics Conference Series (Vol. 184, pp. 455-462)