Optical Control of Spin Coherence in Singly Charged (In,Ga)As/GaAs Quantum Dots

by: A Greilich, R Oulton, EA Zhukov, IA Yugova, DR Yakovlev, M Bayer, A Shabaev, Al, IA Merkulov, V Stavarache, D Reuter, A Wieck

Physical Review Letters, Vol. 96, No. 22. (2006)

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Abstract

Electron spin coherence has been generated optically in n-type modulation doped (In,Ga)As/GaAs quantum dots (QDs) which contain on average a single electron per dot. The coherence arises from resonant excitation of the QDs by circularly polarized laser pulses, creating a coherent superposition of an electron and a trion. Time dependent Faraday rotation is used to probe the spin precession of the optically oriented electrons about a transverse magnetic field. The coherence generation can be controlled by pulse intensity, being most efficient for (2n+1) pulses.

@article{citeulike:2079818, abstract = {Electron spin coherence has been generated optically in n-type modulation doped (In,Ga)As/GaAs quantum dots (QDs) which contain on average a single electron per dot. The coherence arises from resonant excitation of the QDs by circularly polarized laser pulses, creating a coherent superposition of an electron and a trion. Time dependent Faraday rotation is used to probe the spin precession of the optically oriented electrons about a transverse magnetic field. The coherence generation can be controlled by pulse intensity, being most efficient for (2n+1) pulses.}, author = {Greilich, A. and Oulton, R. and Zhukov, E. A. and Yugova, I. A. and Yakovlev, D. R. and Bayer, M. and Shabaev, A. and Al and Merkulov, I. A. and Stavarache, V. and Reuter, D. and Wieck, A. }, citeulike-article-id = {2079818}, doi = {http://dx.doi.org/10.1103/PhysRevLett.96.227401}, journal = {Physical Review Letters}, keywords = {coherence, spin}, number = {22}, posted-at = {2007-12-08 18:43:52}, priority = {2}, publisher = {APS}, title = {Optical Control of Spin Coherence in Singly Charged (In,Ga)As/GaAs Quantum Dots}, url = {http://dx.doi.org/10.1103/PhysRevLett.96.227401}, volume = {96}, year = {2006} }

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TY - JOUR ID - citeulike:2079818 L3 - citeulike-article-id:2079818 TI - Optical Control of Spin Coherence in Singly Charged (In,Ga)As/GaAs Quantum Dots JF - Physical Review Letters VL - 96 IS - 22 PB - APS N2 - Electron spin coherence has been generated optically in n-type modulation doped (In,Ga)As/GaAs quantum dots (QDs) which contain on average a single electron per dot. The coherence arises from resonant excitation of the QDs by circularly polarized laser pulses, creating a coherent superposition of an electron and a trion. Time dependent Faraday rotation is used to probe the spin precession of the optically oriented electrons about a transverse magnetic field. The coherence generation can be controlled by pulse intensity, being most efficient for (2n+1) pulses. KW - coherence KW - spin AU - Greilich, A AU - Oulton, R AU - Zhukov, EA AU - Yugova, IA AU - Yakovlev, DR AU - Bayer, M AU - Shabaev, A AU - Al AU - Merkulov, IA AU - Stavarache, V AU - Reuter, D AU - Wieck, A PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevLett.96.227401 ER -

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