Spin dynamics of cavity polaritons

被引：16

作者：

Martín, MD

Viña, L ^{[1
]}

Son, JK

Mendez, EE

机构：

[1] Univ Autonoma Madrid, Dept Fis Mat 104, E-28049 Madrid, Spain

[2] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

来源：

SOLID STATE COMMUNICATIONS | 2001年 / 117卷 / 04期

关键词：

quantum wells; optical properties; spin dynamics; time-resolved optical spectroscopies;

D O I：

10.1016/S0038-1098(00)00426-9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied polariton spin dynamics in a GaAs/AlGaAs microcavity by means of polarization- and time-resolved photoluminescence spectroscopy as a function of excitation density and normal mode splitting. The experiments reveal a novel behavior of the degree of polarization of the emission, namely the existence of a finite delay to reach its maximum value. We have also found that the stimulated emission of the lower polariton branch has a strong influence on spin dynamics: in an interval of similar to 150 ps the polarization changes from +100% to negative values as high as -60%. This strong modulation of the polarization and its high speed may open new possibilities for spin-based devices. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：267 / 271

页数：5

共 27 条

[1]

ABRAM I, 1996, NATO ADV STUDIED I E, V324

[2] Photon-spin controlled lasing oscillation in surface-emitting lasers [J].