Polarization-dependent plasmonic coupling in dual-layer metallic structures at terahertz frequencies.
Polarization-dependent plasmonic coupling in dual-layer metallic structures at terahertz frequencies.
复制标题
太赫兹频率下双层金属结构中偏振相关的等离子体耦合。
DOI：
10.1364/oe.19.002791
复制
发表时间：
2011
期刊：
影响因子：
3.8
通讯作者：
K. Chan
中科院分区：
文献类型：
--
作者：
Zhongxiang Zhang;K. Chan
制备了双层金属丝孔结构，并测量了其太赫兹透射特性。它们表现出与偏振相关的透射率与大的消光比。模拟和实验结果与不同的线孔方向的结构提供了强有力的证据，共振峰是由两个金属层之间的等离子体激元耦合。提出了一个简化的LC电路模型来解释耦合机制和估计峰值频率。我们的研究结果表明，特定的电磁响应可以通过适当的设计的几何图案的两个金属层和一个合适的偏振的入射波。
Dual-layer metallic wire-hole structures were fabricated and their terahertz transmission properties were measured. They exhibit polarization-dependent transmittance with large extinction ratios. Simulation and experimental results on structures with different wire-to-hole orientations provide strong evidence that the resonance peaks are caused by plasmonic coupling between the two metallic layers. A simplified LC-circuit model is proposed to explain the coupling mechanism and to estimate the peak frequencies. Our results suggest that specific electromagnetic response can be achieved by appropriate design of the geometrical patterns on the two metallic layers and a suitable polarization of the incident wave.
影响因子：
64.8
作者：
Ebbesen, TW;Lezec, HJ;Wolff, PA
通讯作者：
Wolff, PA