Persistent optical nuclear spin narrowing in a singly charged InAs quantum dot

被引：2

作者：

Sun, Bo ^{[1
]}

Yao, Wang ^{[2
,3
]}

Xu, Xiaodong ^{[4
]}

Bracker, Allan S. ^{[5
]}

Gammon, Daniel ^{[5
]}

Sham, L. J. ^{[6
]}

Steel, Duncan ^{[1
]}

机构：

[1] Univ Michigan, Harrison M Randall Lab Phys, Ann Arbor, MI 48109 USA

[2] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[3] Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China

[4] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[5] USN, Res Lab, Washington, DC 20375 USA

[6] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2012年 / 29卷 / 02期

基金：

美国国家科学基金会;

关键词：

STATE PREPARATION; ELECTRON-SPIN; SPECTROSCOPY; EXCITATION; LOCKING;

D O I：

10.1364/JOSAB.29.00A119

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We review the investigation of the hole-assisted dynamical nuclear spin polarization mechanism in a singly charged InAs quantum dot. Using coherent dark state spectroscopy, we measure the locking of the Overhauser field to a value determined only by the laser frequencies. Importantly, we review data that the locking effect can suppress nuclear spin fluctuations. We determine the onset time of the nuclear spin narrowing effect and its persistence absent laser interactions by directly measuring the enhancement of the electron spin coherence. This nuclear field locking effect can be explained in terms of an anisotropic hyperfine coupling between the hole spin and the nuclear spins. (C) 2012 Optical Society of America

引用

页码：A119 / A126

页数：8

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