Manipulating the plasmon-induced transparency in terahertz metamaterials
Manipulating the plasmon-induced transparency in terahertz metamaterials
复制标题
操纵太赫兹超材料中等离子体引起的透明度
DOI：
10.1364/oe.19.008912
复制
发表时间：
2011-04-25
期刊：
影响因子：
3.8
通讯作者：
Zhang, Weili
中科院分区：
文献类型：
--
作者：
Li, Zhongyang;Ma, Yingfang;Zhang, Weili
超材料单元中的超辐射模式谐振器和次辐射模式谐振器之间的耦合在观察由于谐振器之间的相消干涉而引起的尖锐的透明度峰值中起着重要作用。当谐振器在传统的平面布置中彼此更靠近时，这种效果得到增强。我们提出了一种新的平面太赫兹超材料的耦合方案，通过物理上改变超辐射谐振器和次辐射谐振器之间的距离来调谐等离子体激元诱导的透明峰，使得当耦合的谐振器比临界分离距离更近时，透明峰开始消失。这种效应是由于在紧耦合状态下次辐射谐振腔的谐振行为消失所致。这里提出的简单的平面设计展示了一个方案，以操纵电磁诱导的类共振行为的太赫兹超材料，这可能会导致独特的慢光器件的太赫兹应用的发展。(C)2011年美国光学学会
Coupling between superradiant and subradiant mode resonators in a metamaterial unit cell plays an important role in observing the sharp transparency peak due to destructive interference between the resonators. This effect is enhanced as the resonators are brought closer to each other in a conventional planar arrangement. We present a novel coupling scheme of planar terahertz metamaterial to tune the plasmon-induced transparency peak by physically varying the distance between the superradiant and the subradiant resonators in such a way that the transparency peak begins to disappear as the coupled resonators are brought closer than a critical separation distance. The effect is attributed to the disappearance of the resonant behavior of the subradiant resonator in a closely coupled regime. The simple planar design presented here demonstrates a scheme to manipulate the electromagnetically induced transparency-like behavior in terahertz metamaterials and this could lead to the development of unique slow light devices for terahertz applications. (C) 2011 Optical Society of America