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

被引：24

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.

引用

页数：9

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