Optical Control of Coherent Interactions between Electron Spins in InGaAs Quantum Dots

被引：15

作者：

Spatzek, S. ^{[1
]}

Greilich, A. ^{[1
]}

Economou, Sophia E. ^{[2
]}

Varwig, S. ^{[1
]}

Schwan, A. ^{[1
]}

Yakovlev, D. R. ^{[1
,3
]}

Reuter, D. ^{[4
]}

Wieck, A. D. ^{[4
]}

Reinecke, T. L. ^{[2
]}

Bayer, M. ^{[1
]}

机构：

[1] Tech Univ Dortmund, D-44221 Dortmund, Germany

[2] USN, Res Lab, Washington, DC 20375 USA

[3] RAS, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia

[4] Ruhr Univ Bochum, Angew Festkorperphys, D-44780 Bochum, Germany

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.107.137402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Coherent interactions between spins in quantum dots are a key requirement for quantum gates. We have performed pump-probe experiments in which pulsed lasers emitting at different photon energies manipulate two distinct subsets of electron spins within an inhomogeneous InGaAs quantum dot ensemble. The spin dynamics are monitored through their precession about an external magnetic field. These measurements demonstrate spin precession phase shifts and modulations of the magnitude of one subset of oriented spins after optical orientation of the second subset. The observations are consistent with results from a model using a Heisenberg-like interaction with mu eV strength.

引用

页数：5

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