Second-order time correlations within a polariton Bose-Einstein condensate in a CdTe microcavity
Second-order time correlations within a polariton Bose-Einstein condensate in a CdTe microcavity
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DOI：
10.1103/physrevlett.100.067402
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发表时间：
2008-02-15
影响因子：
8.6
通讯作者：
Dang, Le Si
中科院分区：
文献类型：
--
作者：
Kasprzak, J.;Richard, M.;Dang, Le Si
极化子的二阶时间相关性已在 CdTe 微腔的凝结阈值范围内进行了测量。玻色-爱因斯坦凝聚的开始以光子聚束的消失为标志，证明了从类热态到相干态的转变。然而，相干性随着极化激元密度的增加而降低，这很可能是由于凝聚态内的自相互作用以及与非凝聚激子和极化激元的散射造成的。这种行为清楚地区分了极化子玻色凝聚和光子激光。
Second-order time correlations of polaritons have been measured across the condensation threshold in a CdTe microcavity. The onset of Bose-Einstein condensation is marked by the disappearance of photon bunching, demonstrating the transition from a thermal-like state to a coherent state. Coherence is, however, degraded with increasing polariton density, most probably as a result of self-interaction within the condensate and scatterings with noncondensed excitons and polaritons. Such behavior clearly differentiates polariton Bose condensation from photon lasing.