Spontaneous parametric scattering of microcavity polaritons in momentum space

被引：57
|
作者：
Langbein, W [1 ]
机构：
[1] Univ Dortmund, D-44221 Dortmund, Germany
来源：
PHYSICAL REVIEW B | 2004年 / 70卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.70.205301
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We measure the spontaneous parametric emission from a semiconductor microcavity after resonant pulsed coherent excitation. Resolving the emission in time and two-dimensional momentum space, the underlying scattering processes, which were theoretically treated by [Ciuti Phys. Rev. B 63, 041303 (2001)], are validated. The predicted figure-8 shaped distribution of the final states of the parametric scattering is observed. We find a narrowing of the momentum distribution with time, which is a feature of memory effects in the scattering due to parametric correlation. Additionally, the influence of higher-order scattering and pump depletion are observed in the experiment.
引用
收藏
页码：205301 / 1
页数：11
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