Spectroscopic study of dark excitons in InxGa1-xAs self-assembled quantum dots by a magnetic-field-induced symmetry breaking

Citation
M. Bayer et al., Spectroscopic study of dark excitons in InxGa1-xAs self-assembled quantum dots by a magnetic-field-induced symmetry breaking, PHYS REV B, 61(11), 2000, pp. 7273-7276
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
1098-0121 → ACNP
Volume
61
Issue
11
Year of publication
2000
Pages
7273 - 7276
Database
ISI
SICI code
1098-0121(20000315)61:11<7273:SSODEI>2.0.ZU;2-E
Abstract
The dark states of the heavy-hole ground-state exciton have been studied by photoluminescence spectroscopy of single self-assembled In0.60Ga0.40As qua ntum dots in magnetic fields of varying strengths and orientations. When ti lting B out of the [001] crystal direction the exciton states with angular momenta \ m \ = 2 are mixed with the \ m \ = 1 states and become observable . In combination with a detailed analysis of the corresponding Hamiltonian a comprehensive picture of the exciton fine structure is obtained. This fin e structure is characteristic for direct gap semiconductors with a twofold degenerate valence band.