Structural and magneto-optical studies on multiple quantum dots containing magnetic semiconductors

Sang Hoon Lee, D. Y. Shin, H. S. Lee, J. Y. Lee, L. V. Titova, M. Kutrowski, J. K. Furdyna, M. Dobrowolska

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

Abstract

We have fabricated single and multi-layer self-assembled quantum dot (QD) systems based on CdSe/ZnSe combination, including magnetic semiconductors (DMSs). Transmission electron microscopy (TEM) images shows that magnetic QDs are formed within the CdMnSe layer, and they are vertically correlated in multi-layer quantum dot systems. Magneto-optical experiments were also carried out on those structures. The PL energy from multi-layer QDs appears at a lower energy than that emitted by a single QD layer, suggesting that there exists electronic coupling between the QD layers. When an external magnetic field is applied, the PL peaks from QDs both in single-layer and in multi-layer form exhibit a large intensity enhancements and energy shifts, a behavior that is typical for many low dimensional systems involving DMSs. The observed weak PL energy dependence in low magnetic fields can be understood in terms of magnetic polaron formation in these DMS QD systems. We also discuss statistical magnetic fluctuations in these systems, as revealed by PL line narrowing in a magnetic field.

Original languageEnglish
Title of host publicationPhysica Status Solidi C: Conferences
Pages1283-1287
Number of pages5
Edition4
DOIs
Publication statusPublished - 2003
Event2nd International Conference on Semiconductor Quantum Dots, QD 2002 - Tokyo, Japan
Duration: 2002 Sep 302002 Oct 3

Other

Other2nd International Conference on Semiconductor Quantum Dots, QD 2002
CountryJapan
CityTokyo
Period02/9/3002/10/3

    Fingerprint

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Lee, S. H., Shin, D. Y., Lee, H. S., Lee, J. Y., Titova, L. V., Kutrowski, M., Furdyna, J. K., & Dobrowolska, M. (2003). Structural and magneto-optical studies on multiple quantum dots containing magnetic semiconductors. In Physica Status Solidi C: Conferences (4 ed., pp. 1283-1287) https://doi.org/10.1002/pssc.200303069