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Dynamical properties of atom‐like emissions from single localized states in ZnCdS ternary mesa‐shaped structures
Author(s) -
Kumano H.,
Hitaka Y.,
Suemune I.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304270
Subject(s) - exciton , atom (system on chip) , ternary operation , spectral line , emission spectrum , atomic physics , biexciton , molecular physics , condensed matter physics , chemistry , physics , materials science , quantum mechanics , computer science , embedded system , programming language
Dynamical properties of exciton localization into spatially isolated localized states with atom‐like density of states caused by alloy potential fluctuations were examined. Submicron‐sized mesa‐shaped structures were prepared to resolve the contribution of single localized states to the optical spectra, which makes it possible to observe atom‐like emission lines and to discuss the dynamical properties of exciton energy relaxations by employing micro‐time‐resolved PL measurements. It will be shown that in the samples with high exciton energy transfer efficiency, photogenerated excitons can relax into the spatially isolated localized centers with strong zero‐dimensional nature, which leads to the limited number of atom‐like emission lines. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)