Electromagnetically induced transparency and slow light in a simple complementary metamaterial constructed by two bright slot-structures
Electromagnetically induced transparency and slow light in a simple complementary metamaterial constructed by two bright slot-structures
复制标题
由两个亮槽结构构成的简单互补超材料中的电磁感应透明度和慢光
DOI：
10.1007/s00339-013-8159-4
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发表时间：
2014-08
期刊：
影响因子：
--
通讯作者：
Z. X. Geng
中科院分区：
文献类型：
--
作者：
X. J. He;T. Y. Li;L. Wang;J. M. Wang;X. H. Tian;J. X. Jiang;Z. X. Geng
我们在数值上证明了电磁感应透明的等离子体模拟，在一个简单的互补超材料中，其单位电池由沉积在玻璃衬底上的均匀金膜中的两个明亮的槽结构组成。当两个槽结构的对称性被破坏时，通过非对称元件的耦合，激活了宽反射共振谱内明显的透明峰。此外，可以通过控制两个槽结构的不对称程度或间距来调节反射透明峰的强度和宽度。此外，反射透明窗的存在还伴随着慢光效应，其群速度降低了100倍以上。因此，这种互补的超材料在慢光和滤光器件中具有潜在的应用前景。
We numerically demonstrate a plasmonic analogue of electromagnetically induced transparency in a simple complementary metamaterial, the unit cell of which consists of two bright slot-structures in a homogenous gold film deposited on a glass substrate. A pronounced transparency peak within a broad reflectance resonance spectrum is activated through the coupling in the asymmetric elements when the symmetry of two slot-structures is broken. Moreover, the strength and width of the reflectance transparency peak can be tuned by controlling the asymmetric degree or spacing of two slot-structures. In addition, the presence of the reflectance transparency window is also accompanied by slow-light effect, where its group velocity is reduced by a factor of over 100. Therefore, this complementary metamaterial could have the potential applications in slow-light and filtering devices.
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