Optical spectroscopy on single semimagnetic quantum dots - Probing the interaction between an exciton and its magnetic environment

Authors
Bacher, G Maksimov, AA McDonald, A Schomig, H Welsch, MK Kulakovskii, VD Forchel, A Becker, CR Molenkamp, LW Landwehr, G
Citation
G. Bacher et al., Optical spectroscopy on single semimagnetic quantum dots - Probing the interaction between an exciton and its magnetic environment, PHYS ST S-B, 224(2), 2001, pp. 573-577
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
224
Issue
2
Year of publication
2001
Pages
573 - 577
Database
ISI
SICI code
0370-1972(200103)224:2<573:OSOSSQ>2.0.ZU;2-Y
Abstract
Single diluted magnetic semiconductor (DMS) quantum dots are studied by mea ns of photoluminescence spectroscopy and magnetoluminescence. The sp-d exch ange interaction between a single electron-hole pair and roughly 100 Mn spi ns within the dot is demonstrated to result in (i) a significant enhancemen t (more than one order of magnitude) of the emission linewidth and (ii) a s trongly modified magnetic field dependence of the polarization degree in a single DMS quantum dot as compared to a non-magnetic reference sample.