Lu Xinchao, Rockstuhl Carsten, Zhang Weili
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
J Opt Soc Am A Opt Image Sci Vis. 2012 Apr 1;29(4):644-8. doi: 10.1364/JOSAA.29.000644.
Plasmonic structures made of periodically arranged metallic rings integrated into subwavelength holes are investigated at the far-infrared terahertz frequencies. The emergence and the interplay of various resonances sustained by such plasmonic samples are elucidated. To reveal a coherent physical picture, relevant dimensions of the samples are modified and their impact on the resonance properties is analyzed. The experimental work is fully supported by numerical simulations. The understanding of the interplay of various resonances will foster applications which require plasmonic substrates to exhibit simultaneously resonances at well-defined frequencies and line widths.
对由集成到亚波长孔中的周期性排列金属环制成的等离激元结构在远红外太赫兹频率下进行了研究。阐明了此类等离激元样品所维持的各种共振的出现及其相互作用。为了揭示一个连贯的物理图像，对样品的相关尺寸进行了修改，并分析了它们对共振特性的影响。实验工作得到了数值模拟的充分支持。对各种共振相互作用的理解将促进需要等离激元基底在明确定义的频率和线宽下同时表现出共振的应用。
