Directional Dicke Subradiance with Nonclassical and Classical Light Sources.
Directional Dicke Subradiance with Nonclassical and Classical Light Sources.
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DOI：
10.1103/physrevlett.120.113603
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发表时间：
2017-12
影响因子：
8.6
通讯作者：
D. Bhatti;Raimund Schneider;S. Oppel;J. von Zanthier
中科院分区：
文献类型：
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作者：
D. Bhatti;Raimund Schneider;S. Oppel;J. von Zanthier
我们研究了自由空间中N≥2个远量子源的Dicke子辐射，即在完全反对称状态下制备的自发辐射非相互作用多能级原子或多光子源的空间发射模式。我们发现辐射强度的特点是在特定方向上完全抑制了自发辐射。与对称迪克态下制备的N个远能级原子的类似但反向的超辐射发射曲线相似，我们将相应的发射模式称为定向迪克子辐射。我们进一步推导出统计独立的热光源发出的光的高阶强度相关性显示出相同的定向迪克次辐射行为，并表明它源于与量子光源相同的干涉现象。我们最后给出了N=2，…，5个远距离热光源的定向迪克子辐射的测量结果，证实了理论发现。
We investigate Dicke subradiance of N≥2 distant quantum sources in free space, i.e., the spatial emission patterns of spontaneously radiating noninteracting multilevel atoms or multiphoton sources, prepared in totally antisymmetric states. We find that the radiated intensity is marked by a full suppression of spontaneous emission in particular directions. In resemblance to the analogous, yet inverted, superradiant emission profiles of N distant two-level atoms prepared in symmetric Dicke states, we call the corresponding emission patterns directional Dicke subradiance. We further derive that higher-order intensity correlations of the light emitted by statistically independent thermal light sources display the same directional Dicke subradiant behavior and show that it stems from the same interference phenomenon as in the case of quantum sources. We finally present measurements of directional Dicke subradiance for N=2,…,5 distant thermal light sources corroborating the theoretical findings.