2006/10/17 by R. Seguin, S. Rodt, A. Schliwa +3 · 16 citations
Materials Science · Physics and Astronomy · #Advanced Materials and Semiconductor Technologies #Anisotropy #Biexciton #Cathodoluminescence #Chemical and Physical Properties of Materials #Exchange interaction #Excited state #Exciton #Polarization (electrochemistry) #Quantum dot #Semiconductor Quantum Structures and Devices #Trion #cond-mat.mtrl-sci
paper · pdf · doi:10.1002/pssb.200671519
published in physica status solidi (b) 243(15), 3937-3941 (Wiley) · 4 pages, 3 figures, to be published in phys. stat. sol (b), proceedings of the QD2006, May 1-5 2006, Chamonix-Mont-Blanc, France
arxiv created 2006/10/17 · openalex publication_date 2006/10/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract A comprehensive study of the exchange interaction between charge carriers in self‐organized InAs/GaAs quantum dots is presented. Single quantum‐dot cathodoluminescence spectra of quantum dots of different sizes are analyzed. Special attention is paid to the energetic structure of the charged excited exciton (hot trion). A varying degree of intermixing within the hot trion states leads to varying degrees of polarization of the corresponding emission lines. The emission characteristics change from circularly polarized for small quantum dots to elliptically polarized for large quantum dots. The findings are explained by a change of magnitude of the anisotropic exchange interaction and compared to the related effect of fine‐structure splitting in the neutral exciton and biexciton emission. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)