Spontaneous polarization buildup in a room-temperature polariton laser

被引：194

作者：

Baumberg, J. J. ^{[1
]}

Kavokin, A. V. ^{[2
]}

Christopoulos, S. ^{[1
]}

Grundy, A. J. D. ^{[2
]}

Butte, R. ^{[3
]}

Christmann, G. ^{[3
]}

Solnyshkov, D. D. ^{[4
]}

Malpuech, G. ^{[4
]}

von Hoegersthal, G. Baldassarri Hoeger ^{[2
]}

Feltin, E. ^{[3
]}

Carlin, J. -F. ^{[3
]}

Grandjean, N. ^{[3
]}

机构：

[1] Univ Cambridge, Dept Phys, NanoPhoton Ctr, Cambridge CB3 0HE, England

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

[3] Ecole Polytech Fed Lausanne, Inst Quantum Elect & Photon, CH-1015 Lausanne, Switzerland

[4] Univ Clermont Ferrand, CNRS, LASMEA, F-632177 Aubiere, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 13期

基金：

英国工程与自然科学研究理事会; 瑞士国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.136409

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observe the buildup of strong (similar to 50%) spontaneous vector polarization in emission from a GaN-based polariton laser excited by short optical pulses at room temperature. The Stokes vector of emitted light changes its orientation randomly from one excitation pulse to another, so that the time-integrated polarization remains zero. This behavior is completely different from any previous laser. We interpret this observation in terms of the spontaneous symmetry breaking in a Bose-Einstein condensate of exciton polaritons.

引用

页数：4

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