Spontaneous parametric scattering of microcavity polaritons in momentum space
Spontaneous parametric scattering of microcavity polaritons in momentum space
复制标题
动量空间中微腔极化子的自发参量散射
DOI：
10.1103/physrevb.70.205301
复制
发表时间：
2004
影响因子：
3.7
通讯作者：
W. Langbein
中科院分区：
文献类型：
--
作者：
W. Langbein
我们测量了半导体微腔在共振脉冲相干激发下的自发参量辐射。在时间和二维动量空间中解析发射，验证了[ Ciuti et B 63 041303（2001）]理论上处理的潜在散射过程。观察到的参数散射的最终状态的预测图8形状的分布。我们发现随着时间的推移，这是一个功能的记忆效应的散射由于参数相关性的动量分布变窄。此外，在实验中还观察到了高阶散射和抽运损耗的影响。
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 et al. 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.