Berlin 2005 – scientific programme
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HL: Halbleiterphysik
HL 29: Spintronik IV
HL 29.5: Talk
Saturday, March 5, 2005, 16:00–16:15, TU P270
Spin dynamics of electrons in n-doped InAs quantum dots. — •Alex Greilich, Irina Yugova, Sergej Verbin, Evgenij Zhukov, Matthias Schwab, Dmitrij Yakovlev, and Manfred Bayer — Experimentelle Physik II, Universität Dortmund, D-44221, Germany
We have studied the carrier spin dynamics in n-doped InAs quantum dots (QDs) and have compared it with the one from undoped reference dots. The measurements are time-resolved and was done with mode locked Ti:Sa laser (frequency 76MHz, 1-ps pulse duration) and the signal was detected either by a streak camera or by pump and probe time-resolved Faraday rotation. T2 and T1 times in n-doped QDs were considerably longer than in undoped QDs. The dependence of these times on temperature, magnetic field and excitation power was measured and analyzed.