Many-Body Subradiant Excitations in Metamaterial Arrays: Experiment and Theory
Many-Body Subradiant Excitations in Metamaterial Arrays: Experiment and Theory
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DOI：
10.1103/physrevlett.119.053901
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发表时间：
2017-08-03
影响因子：
8.6
通讯作者：
Zheludev, Nikolay I.
中科院分区：
文献类型：
--
作者：
Jenkins, Stewart D.;Ruostekoski, Janne;Zheludev, Nikolay I.
迪克最初预测的次辐射激发由于其与环境的弱辐射耦合而对物理学提出了长期的挑战。在这里，我们在平面超材料阵列中设计了大量相干驱动的经典次辐射，作为由 1000 多个超分子组成的空间扩展本征模式。通过将大规模数值模拟中的近场和远场响应与实验观察中的近场和远场响应进行比较，我们确定了主导总激发能量的经典相关多超分子次辐射态的有力证据。我们表明，类似的空间扩展的多体亚辐射也可以存在于光学频率的等离子体超材料阵列中。
Subradiant excitations, originally predicted by Dicke, have posed a long-standing challenge in physics owing to their weak radiative coupling to environment. Here we engineer massive coherently driven classical subradiance in planar metamaterial arrays as a spatially extended eigenmode comprising over 1000 metamolecules. By comparing the near-and far-field response in large-scale numerical simulations with those in experimental observations we identify strong evidence for classically correlated multi-metamolecule subradiant states that dominate the total excitation energy. We show that similar spatially extended many-body subradiance can also exist in plasmonic metamaterial arrays at optical frequencies.