Angle-resolved photon-coincidence measurements in a multiple-scattering medium
Angle-resolved photon-coincidence measurements in a multiple-scattering medium
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多重散射介质中的角度分辨光子符合测量
DOI：
10.1103/physreva.83.043819
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发表时间：
2010
影响因子：
2.9
通讯作者：
P. Lodahl
中科院分区：
文献类型：
--
作者：
S. Smolka;O. Muskens;A. Lagendijk;P. Lodahl
我们介绍了在三维无序介质中传输后的光子之间的角分辨关联测量。多重散射过程产生光子关联，对于具有不同光子统计的光源，可以直接测量这些关联。我们发现，角度远大于平均散斑宽度的不同角度方向之间的多重散射光子具有很强的相关性。研究了角光子关联函数的时间依赖性，确定了光源的相干时间。我们的结果与光的多次散射的连续模量子理论非常一致。为了研究多重散射随机介质中的量子现象，如量子干涉和光子的量子纠缠，所提供的实验技术是必不可少的。
We present angle-resolved correlation measurements between photons after propagation through a three-dimensional disordered medium. The multiple-scattering process induces photon correlations that are directly measured for light sources with different photon statistics. We find that multiple-scattered photons between different angular directions with angles much larger than the average speckle width are strongly correlated. The time dependence of the angular photon correlation function is investigated, and the coherence time of the light source is determined. Our results are found to be in excellent agreement with the continuous mode quantum theory of multiple scattering of light. The presented experimental technique is essential in order to study quantum phenomena in multiple-scattering random media, such as quantum interference and quantum entanglement of photons.