Pumping of Nuclear Spins by Optical Excitation of Spin-Forbidden Transitions in a Quantum Dot

被引：60

作者：

Chekhovich, E. A. ^{[1
,2
]}

Makhonin, M. N. ^{[1
]}

Kavokin, K. V. ^{[1
,3
]}

Krysa, A. B. ^{[4
]}

Skolnick, M. S. ^{[1
]}

Tartakovskii, A. I. ^{[1
]}

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Inst Solid State Phys, Chernogolovka 142432, Russia

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

[4] Univ Sheffield, Dept Elect & Elect Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

SINGLE-HOLE SPIN; STATE PREPARATION; POLARIZATION; ELECTRON; LOCKING;

D O I：

10.1103/PhysRevLett.104.066804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate that efficient optical pumping of nuclear spins in semiconductor quantum dots (QDs) can be achieved by resonant pumping of optically forbidden transitions. This process corresponds to one-to-one conversion of a photon absorbed by the dot into a polarized nuclear spin, and also has potential for initialization of hole spin in QDs. We find that by employing this spin-forbidden process, nuclear polarization of 65% can be achieved, markedly higher than from pumping the allowed transition, which saturates due to the low probability of electron-nuclear spin flip-flop.

引用

页数：4

共 20 条

[1] Abragam A., 1961, The principles of nuclear magnetism
[2] Quantum-dot spin-state preparation with near-unity fidelity
Atatüre, M
Dreiser, J
Badolato, A
Högele, A
Karrai, K
Imamoglu, A
[J]. SCIENCE, 2006, 312 (5773) : 551 - 553
[3] Fine structure and optical pumping of spins in individual semiconductor quantum dots
Bracker, Allan S.
Gammon, Daniel
Korenev, Vladimir L.
[J]. SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 2008, 23 (11)
[4] A Coherent Single-Hole Spin in a Semiconductor
Brunner, Daniel
Gerardot, Brian D.
Dalgarno, Paul A.
Wuest, Gunter
Karrai, Khaled
Stoltz, Nick G.
Petroff, Pierre M.
Warburton, Richard J.
[J]. SCIENCE, 2009, 325 (5936) : 70 - 72
[5] Electron and nuclear spin interactions in the optical spectra of single GaAs quantum dots
Gammon, D
Efros, AL
Kennedy, TA
Rosen, M
Katzer, DS
Park, D
Brown, SW
Korenev, VL
Merkulov, IA
[J]. PHYSICAL REVIEW LETTERS, 2001, 86 (22) : 5176 - 5179
[6] Optical pumping of a single hole spin in a quantum dot
Gerardot, Brian D.
Brunner, Daniel
Dalgarno, Paul A.
Ohberg, Patrik
Seidl, Stefan
Kroner, Martin
Karrai, Khaled
Stoltz, Nick G.
Petroff, Pierre M.
Warburton, Richard J.
[J]. NATURE, 2008, 451 (7177) : 441 - 444
[7] OVERHAUSER SHIFT AND DYNAMIC NUCLEAR-POLARIZATION IN INP
GOTSCHY, B
DENNINGER, G
OBLOH, H
WILKENING, W
SCHNEIDER, J
[J]. SOLID STATE COMMUNICATIONS, 1989, 71 (07) : 629 - 632
[8] Mode locking of electron spin coherences in singly charged quantum dots
Greilich, A.
Yakovlev, D. R.
Shabaev, A.
Efros, Al. L.
Yugova, I. A.
Oulton, R.
Stavarache, V.
Reuter, D.
Wieck, A.
Bayer, M.
[J]. SCIENCE, 2006, 313 (5785) : 341 - 345
[9] Observation of extremely slow hole spin relaxation in self-assembled quantum dots
Heiss, D.
Schaeck, S.
Huebl, H.
Bichler, M.
Abstreiter, G.
Finley, J. J.
Bulaev, D. V.
Loss, Daniel
[J]. PHYSICAL REVIEW B, 2007, 76 (24)
[10] Optical pumping of quantum-dot nuclear spins
Imamoglu, A
Knill, E
Tian, L
Zoller, P
[J]. PHYSICAL REVIEW LETTERS, 2003, 91 (01)

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