Spontaneous coherent phase transition of polaritons in CdTe microcavities -: art. no. 187401

被引：119

作者：

Richard, M ^{[1
]}

Kasprzak, J ^{[1
]}

Romestain, R ^{[1
]}

André, R ^{[1
]}

Dang, LS ^{[1
]}

机构：

[1] Univ Grenoble 1, Spectrometrie Phys Lab, CEA CNRS UJF Grp Nanophys & Semicond, CNRS,UMR5588, F-38402 St Martin Dheres, France

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.94.187401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on evidence for polariton condensation out of a reservoir of incoherent polaritons. Polariton population and first-order coherence are investigated by spectroscopic imaging of the far-field emission of a CdTe-based microcavity under nonresonant pumping. With increasing pumping power, stimulated emission with thresholdlike behavior and spectral narrowing is observed in the strong exciton-photon coupling regime. We show that it comes from a narrow ring in k space, exhibiting enhanced spatial and angular coherence at the stimulation onset.

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页数：4

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