Comparison of magneto-optical properties of various excitonic complexes in CdTe and CdSe self-assembled quantum dots. (13th May 2016)

• Record Type: Journal Article
• Authors: Kobak, J; Smoleński, T; Goryca, M; Rousset, J-G; Pacuski, W; Bogucki, A; Oreszczuk, K; Kossacki, P; Nawrocki, M; Golnik, A; Płachta, J; Wojnar, P; Kruse, C; Hommel, D; Potemski, M; Kazimierczuk, T
• Is Part Of: Journal of physics. Volume 28:Number 26(2016)
• Publication Date: 2016-05-13
• Subjects: CdTe/ZnTe -- CdSe/ZnSe -- quantum dot -- spectroscopy -- Landé factor g -- diamagnetic shift -- fine-structure splitting; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/28/26/265302
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We present a comparative study of two self-assembled quantum dot (QD) systems based on II–VI compounds: CdTe/ZnTe and CdSe/ZnSe. Using magneto-optical techniques we investigated a large population of individual QDs. The systematic photoluminescence studies of emission lines related to the recombination of neutral exciton X, biexciton XX, and singly charged excitons (X +, X − ) allowed us to determine average parameters describing CdTe QDs (CdSe QDs): X–XX transition energy difference 12 meV (24 meV); fine-structure splitting δ 1 = 0.14 meV ( δ 1 = 0.47 meV); g -factor g = 2.12 ( g = 1.71); diamagnetic shift γ = 2.5 μ e V T − 2 ( γ = 1.3 μ e V T − 2 ). We find also statistically significant correlations between various parameters describing internal structure of excitonic complexes.