Quantum interference control of ballistic pure spin currents in semiconductors

被引：260

作者：

Stevens, MJ ^{[1
]}

Smirl, AL

Bhat, RDR

Najmaie, A

Sipe, JE

van Driel, HM

机构：

[1] Univ Iowa, IATL 138, Lab Photon & Quantum Elect, Iowa City, IA 52242 USA

[2] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.90.136603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate all-optical quantum interference injection and control of a ballistic pure spin current (without an accompanying charge current) in GaAs/AlGaAs quantum wells, consisting of spin-up electrons traveling in one direction and spin-down electrons traveling in the opposite direction. This current is generated through quantum interference of one- and two-photon absorption of similar to100 fs phase-locked pulses that have orthogonal linear polarizations. We use a spatially resolved pump-probe technique to measure carrier movement of similar to10 nm. Results agree with recent theoretical predictions.

引用

页数：4

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