Stochastic polarization formation in exciton-polariton Bose-Einstein condensates

被引：69

作者：

Read, D. ^{[1
]}

Liew, T. C. H. ^{[1
,2
]}

Rubo, Yuri G. ^{[1
,3
]}

Kavokin, A. V. ^{[1
,4
]}

机构：

[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England

[2] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

[3] Univ Nacl Autonoma Mexico, Ctr Invest Energia, Temixco 62580, Morelos, Mexico

[4] Univ Roma Tor Vergata, Marie Curie Chair Excellence Polariton Devices, I-00133 Rome, Italy

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 19期

关键词：

Bose-Einstein condensation; excitons; microcavities; polaritons; stochastic processes; SEMICONDUCTOR MICROCAVITY; DYNAMICS;

D O I：

10.1103/PhysRevB.80.195309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate theoretically the spontaneous formation of a stochastic polarization in exciton-polariton Bose-Einstein condensates in planar microcavities under pulsed excitation. Below the threshold pumping intensity (dependent on the polariton lifetime), the average polarization degree is close to zero, while above threshold the condensate acquires a polarization described by a (pseudospin) vector with random orientation, in general. It is shown that the polariton-polariton interaction leads to suppression of the linear polarization degree of the condensate due to the self-induced Larmor precession of the pseudospin. We establish the link between the second-order coherence of the polariton condensate and the distribution function of its polarization. We examine also the mechanisms of polarization dephasing and relaxation.

引用

页数：10

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