Premium
Optical control of electron spin dynamics in self‐assembled (In,Ga)As/GaAs quantum dots
Author(s) -
Greilich A.,
Oulton R.,
Zhukov E. A.,
Yugova I. A.,
Yakovlev D. R.,
Bayer M.,
Shabaev A.,
Efros Al. L.,
Stavarache V.,
Reuter D.,
Wieck A.
Publication year - 2006
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.200642371
Subject(s) - quantum dot , condensed matter physics , electron , spins , physics , coherence (philosophical gambling strategy) , magnetic field , excitation , coherent control , coherence time , spin (aerodynamics) , quantum dot laser , laser , quantum well , optoelectronics , quantum mechanics , thermodynamics
Spin coherence has been studied in self‐assembled (In,Ga)As/GaAs quantum dots which contain on average a single electron per dot due to n‐type modulation doping. A magnetic field was applied in the Voigt geometry, in order to study the precession of the electron spins which are oriented normal to the field. Here we address the mechanism by which such a normal orientation can be achieved by resonant excitation with circularly polarized laser pulses. Further, we discuss, how long this coherence is maintained within an ensemble of quantum dots. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)