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Single quantum dot pairs with controllable interdot coupling
Author(s) -
Welsch M. K.,
Bacher G.,
Schömig H.,
Forchel A.,
Zaitsev S.,
Becker C. R.,
Molenkamp L. W.
Publication year - 2003
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.200303054
Subject(s) - quantum dot , coupling (piping) , physics , heterojunction , condensed matter physics , magnetic field , optoelectronics , quantum mechanics , materials science , metallurgy
We report on a new approach for preparing single pairs of quantum dots with controllable interdot coupling. Starting from a double quantum well heterostructure, a selective intermixing technique was applied to define pairs of vertically stacked single quantum dots. The incorporation of Mn 2+ ions in only one of the dots results in strongly different effective g ‐factors of the dots, enabling us to control the interdot coupling simply by applying an external magnetic field.