Ultrafast below-resonance Raman rotation of electron spins in GaAs quantum wells

被引：22

作者：

Carter, S. G.

Chen, Z.

Cundiff, S. T.

机构：

[1] Natl Inst Stand & Technol, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.76.201308

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate that short optical pulses below the absorption edge of GaAs quantum wells rotate the spin polarization of dopant electrons with negligible excitation of additional carriers. The dopant electrons are partially polarized by a magnetic field perpendicular to the optical axis, and a circularly polarized pump pulse rotates the polarization through an adiabatic Raman process. This rotated spin polarization precesses in the magnetic field out of phase by pi/2 relative to spin-polarized carriers generated by absorption. This technique can be used to manipulate spin polarizations without the complication of optically excited electrons and holes.

引用

收藏

页数：4

相关论文

共 22 条

[1] Quantum-dot spin-state preparation with near-unity fidelity [J].

Atatüre, M ;

Dreiser, J ;

Badolato, A ;

Högele, A ;

Karrai, K ;

Imamoglu, A .

SCIENCE, 2006, 312 (5773) :551-553

[2] Theory of quantum optical control of a single spin in a quantum dot [J].

Chen, PC ;

Piermarocchi, C ;

Sham, LJ ;

Gammon, D ;

Steel, DG .

PHYSICAL REVIEW B, 2004, 69 (07)

[3] Electron spin polarization through interactions between excitons, trions, and the two-dimensional electron gas [J].

Chen, Z. ;

Bratschitsch, R. ;

Carter, S. G. ;

Cundiff, S. T. ;

Yakovlev, D. R. ;

Karczewski, G. ;

Wojtowicz, T. ;

Kossut, J. .

PHYSICAL REVIEW B, 2007, 75 (11)

[4] Quantum computers based on electron spins controlled by ultrafast off-resonant single optical pulses [J].

Clark, Susan M. ;

Fu, Kai-Mei C. ;

Ladd, Thaddeus D. ;

Yamamoto, Yoshihisa .

PHYSICAL REVIEW LETTERS, 2007, 99 (04)

[5] Stimulated and spontaneous optical generation of electron spin coherence in charged GaAs quantum dots [J].

Dutt, MVG ;

Cheng, J ;

Li, B ;

Xu, XD ;

Li, XQ ;

Berman, PR ;

Steel, DG ;

Bracker, AS ;

Gammon, D ;

Economou, SE ;

Liu, RB ;

Sham, LJ .

PHYSICAL REVIEW LETTERS, 2005, 94 (22)

[6] Proposal for optical U(1) rotations of electron spin trapped in a quantum dot [J].

Economou, Sophia E. ;

Sham, L. J. ;

Wu, Yanwen ;

Steel, D. G. .

PHYSICAL REVIEW B, 2006, 74 (20)

[7] Optical control of spin coherence in singly charged (In,Ga)As/GaAs quantum dots [J].

Greilich, A. ;

Oulton, R. ;

Zhukov, E. A. ;

Yugova, I. A. ;

Yakovlev, D. R. ;

Bayer, M. ;

Shabaev, A. ;

Efros, Al. L. ;

Merkulov, I. A. ;

Stavarache, V. ;

Reuter, D. ;

Wieck, A. .

PHYSICAL REVIEW LETTERS, 2006, 96 (22)

[8] Ultrafast manipulation of electron spin coherence [J].

Gupta, JA ;

Knobel, R ;

Samarth, N ;

Awschalom, DD .

SCIENCE, 2001, 292 (5526) :2458-2461

[9] Quantum information processing using quantum dot spins and cavity QED [J].

Imamoglu, A ;

Awschalom, DD ;

Burkard, G ;

DiVincenzo, DP ;

Loss, D ;

Sherwin, M ;

Small, A .

PHYSICAL REVIEW LETTERS, 1999, 83 (20) :4204-4207

[10] Optical initialization and dynamics of spin in a remotely doped quantum well [J].

Kennedy, TA ;

Shabaev, A ;

Scheibner, M ;

Efros, AL ;

Bracker, AS ;

Gammon, D .

PHYSICAL REVIEW B, 2006, 73 (04)