Strong hyperfine-induced modulation of an optically driven hole spin in an InAs quantum dot

被引：25

作者：

Carter, S. G. ^{[1
]}

Economou, Sophia E. ^{[1
]}

Greilich, A. ^{[1
]}

Barnes, Edwin ^{[2
]}

Sweeney, T. ^{[1
]}

Bracker, A. S. ^{[1
]}

Gammon, D. ^{[1
]}

机构：

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

[2] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 07期

关键词：

ECHO;

D O I：

10.1103/PhysRevB.89.075316

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Compared to electrons, holes in InAs quantum dots have a significantly weaker hyperfine interaction that leads to less dephasing from nuclear spins. Thus many recent studies have suggested that nuclear spins are unimportant for hole-spin dynamics compared to electric-field fluctuations. We show that the hole hyperfine interaction can have a strong effect on hole-spin coherence measurements through a nuclear feedback effect. The nuclear polarization is generated through a unique process that is dependent on the anisotropy of the hole hyperfine interaction and the coherent precession of nuclear spins, giving rise to strong modulation at the nuclear precession frequency.

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页数：9

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