Ultrahigh Bandwidth Spin Noise Spectroscopy: Detection of Large g-Factor Fluctuations in Highly-n-Doped GaAs

被引：30

作者：

Berski, Fabian ^{[1
]}

Kuhn, Hendrik ^{[1
]}

Lonnemann, Jan G. ^{[1
]}

Huebner, Jens ^{[1
]}

Oestreich, Michael ^{[1
]}

机构：

[1] Leibniz Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 18期

关键词：

Spin fluctuations - III-V semiconductors - Bandwidth - Doping (additives) - Ultrafast lasers - Semiconducting gallium - Optical pumping - Stochastic systems;

D O I：

10.1103/PhysRevLett.111.186602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We advance all optical spin noise spectroscopy (SNS) in semiconductors to detection bandwidths of several hundred gigahertz by employing a sophisticated scheme of pulse trains from ultrafast laser oscillators as an optical probe. The ultrafast SNS technique avoids the need for optical pumping and enables nearly perturbation free measurements of extremely short spin dephasing times. We apply the technique to highly-n-doped bulk GaAs where magnetic field dependent measurements show unexpected large g-factor fluctuations. Calculations suggest that such large g-factor fluctuations do not necessarily result from extrinsic sample variations but are intrinsically present in every doped semiconductor due to the stochastic nature of the dopant distribution.

引用

页数：5

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