Simultaneous Subsecond Hyperpolarization of the Nuclear and Electron Spins of Phosphorus in Silicon by Optical Pumping of Exciton Transitions

被引：51

作者：

Yang, A. ^{[1
]}

Steger, M. ^{[1
]}

Sekiguchi, T. ^{[1
]}

Thewalt, M. L. W. ^{[1
]}

Ladd, T. D. ^{[2
]}

Itoh, K. M. ^{[3
]}

Riemann, H. ^{[4
]}

Abrosimov, N. V. ^{[4
]}

Becker, P. ^{[5
]}

Pohl, H. -J. ^{[6
]}

机构：

[1] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[2] Stanford Univ, Edward L Ginzton Lab, Stanford, CA 94305 USA

[3] Keio Univ, Yokohama, Kanagawa 2238522, Japan

[4] Inst Crystal Growth IKZ, D-12489 Berlin, Germany

[5] PTB Braunschweig, D-38116 Braunschweig, Germany

[6] VITCON Projectconsult GmbH, D-07745 Jena, Germany

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 25期

基金：

加拿大自然科学与工程研究理事会;

关键词：

POLARIZATION; RESONANCE; DEFECTS; DONORS;

D O I：

10.1103/PhysRevLett.102.257401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate a method which can hyperpolarize both the electron and nuclear spins of (31)P donors in Si at low field, where both would be essentially unpolarized in equilibrium. It is based on the selective ionization of donors in a specific hyperfine state by optically pumping donor bound exciton hyperfine transitions, which can be spectrally resolved in (28)Si. Electron and nuclear polarizations of 90% and 76%, respectively, are obtained in less than a second, providing an initialization mechanism for qubits based on these spins, and enabling further ESR and NMR studies on dilute (31)P in (28)Si.

引用

页数：4

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