Embedded Photonic Eigenvalues in 3D Nanostructures
Embedded Photonic Eigenvalues in 3D Nanostructures
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DOI：
10.1103/physrevlett.112.213903
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发表时间：
2014-05-29
影响因子：
8.6
通讯作者：
Alu, Andrea
中科院分区：
文献类型：
--
作者：
Monticone, Francesco;Alu, Andrea
光的限制通常是通过降低周围环境的光子态密度来实现的，例如在波导和光子晶体腔中。相反，光学束缚态最近被证明存在于大型周期阵列中的辐射连续体中，类似于某些量子系统中的嵌入本征值。在这里，我们证明了在特定条件下，在亚波长开散射系统中诱导三维光子嵌入本征值是可能的。这些无辐射损耗的光学态的显著特性可能导致在纳米光子结构中出现前所未有的光局域化。
Confinement of light is usually achieved by reducing the photonic density of states of the surrounding environment, as in waveguides and photonic crystal cavities. In contrast, optical bound states have been recently shown to exist within the radiation continuum in large periodic arrays, in analogy with embedded eigenvalues in certain quantum systems. Here we demonstrate that under special conditions it may be possible to induce three-dimensional photonic embedded eigenvalues in a subwavelength open scattering system. The striking properties of these optical states without radiation loss may lead to unprecedented light localization in nanophotonic structures.