Terahertz spin precession and coherent transfer of angular momenta in magnetic quantum wells

被引：178
作者：
Crooker, SA
Baumberg, JJ
Flack, F
Samarth, N
Awschalom, DD
机构：
[1] HITACHI CAMBRIDGE LAB,CAMBRIDGE CB3 0HE,ENGLAND
[2] PENN STATE UNIV,DEPT PHYS,UNIVERSITY PK,PA 16802
来源：
PHYSICAL REVIEW LETTERS | 1996年 / 77卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.77.2814
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Femtosecond-resolved measurements of induced Faraday rotation reveal exchange coupling between the spin angular momenta of charge carriers and a sublattice of magnetic ions in semiconductor quantum wells. In transverse magnetic fields, we observe terahertz spin precession of photoinjected electrons, rapid spin relaxation of holes, and the coherent transfer of angular momentum to the magnetic sublattice via the ultrafast rotation of the local moments. The perturbed ions undergo free-induction decay, enabling time-domain all-optical electron-spin-resonance measurements in single magnetic planes.
引用
收藏
页码：2814 / 2817
页数：4
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