Optical pumping of the electronic and nuclear spin of single charge-tunable quantum dots

被引：285

作者：

Bracker, AS ^{[1
]}

Stinaff, EA

Gammon, D

Ware, ME

Tischler, JG

Shabaev, A

Efros, AL

Park, D

Gershoni, D

Korenev, VL

Merkulov, IA

机构：

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

[2] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.94.047402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a comprehensive examination of optical pumping of spins in individual GaAs quantum dots as we change the net charge from positive to neutral to negative with a charge-tunable heterostructure. Negative photoluminescence polarization memory is enhanced by optical pumping of ground state electron spins, which we prove with the first measurements of the Hanle effect on an individual quantum dot. We use the Overhauser effect in a high longitudinal magnetic field to demonstrate efficient optical pumping of nuclear spins for all three charge states of the quantum dot.

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页码：1 / 4

页数：4

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