Knight-field-enabled nuclear spin polarization in single quantum dots

被引：169

作者：

Lai, CW ^{[1
]}

Maletinsky, P ^{[1
]}

Badolato, A ^{[1
]}

Imamoglu, A ^{[1
]}

机构：

[1] ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.96.167403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate dynamical nuclear-spin polarization in the absence of an external magnetic field by resonant circularly polarized optical excitation of a single electron or hole charged quantum dot. Optical pumping of the electron spin induces an effective inhomogeneous magnetic (Knight) field that determines the direction along which nuclear spins could polarize and enables nuclear-spin cooling by suppressing depolarization induced by nuclear dipole-dipole interactions. Our experiments constitute a first step towards a quantum measurement of the Overhauser field.

引用

收藏

页数：4

相关论文

共 25 条

[1] GIANT OVERHAUSER SHIFT OF CONDUCTION-ELECTRON SPIN-RESONANCE DUE TO OPTICAL POLARIZATION OF NUCLEI IN SEMICONDUCTORS [J].

BERKOVITS, VL ;

HERMANN, C ;

LAMPEL, G ;

NAKAMURA, A .

PHYSICAL REVIEW B, 1978, 18 (04) :1767-1779

[2] Optical pumping of the electronic and nuclear spin of single charge-tunable quantum dots [J].

Bracker, AS ;

Stinaff, EA ;

Gammon, D ;

Ware, ME ;

Tischler, JG ;

Shabaev, A ;

Efros, AL ;

Park, D ;

Gershoni, D ;

Korenev, VL ;

Merkulov, IA .

PHYSICAL REVIEW LETTERS, 2005, 94 (04) :1-4

[3] Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics [J].

Coish, WA ;

Loss, D .

PHYSICAL REVIEW B, 2004, 70 (19) :1-21

[4] Selective dynamic nuclear spin polarization in a spin-blocked double dot [J].

Deng, CX ;

Hu, XD .

PHYSICAL REVIEW B, 2005, 71 (03)

[5]

Dyakonov M. I., 1973, Soviet Physics - JETP, V36, P995

[6]

EBLE B, CONDMAT0508281

[7] Nuclear spectroscopy in single quantum dots: Nanoscopic Raman scattering and nuclear magnetic resonance [J].

Gammon, D ;

Brown, SW ;

Snow, ES ;

Kennedy, TA ;

Katzer, DS ;

Park, D .

SCIENCE, 1997, 277 (5322) :85-88

[8] Electron and nuclear spin interactions in the optical spectra of single GaAs quantum dots [J].

Gammon, D ;

Efros, AL ;

Kennedy, TA ;

Rosen, M ;

Katzer, DS ;

Park, D ;

Brown, SW ;

Korenev, VL ;

Merkulov, IA .

PHYSICAL REVIEW LETTERS, 2001, 86 (22) :5176-5179

[9]

Gryncharova E., 1977, SOV PHYS SEMICOND, V11, p[997, 1697]

[10] Spin-selective optical absorption of singly charged excitons in a quantum dot -: art. no. 221905 [J].

Högele, A ;

Kroner, M ;

Seidl, S ;

Karrai, K ;

Atatüre, M ;

Dreiser, J ;

Imamoglu, A ;

Warburton, RJ ;

Badolato, A ;

Gerardot, BD ;

Petroff, PM .

APPLIED PHYSICS LETTERS, 2005, 86 (22) :1-3