中国物理B ›› 2013, Vol. 22 ›› Issue (8): 87302-087302.doi: 10.1088/1674-1056/22/8/087302
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
秦刚a, 王甲富b, 闫明宝b, 陈维b, 陈红雅b, 李勇峰b
Qin Gang (秦刚)a, Wang Jia-Fu (王甲富)b, Yan Ming-Bao (闫明宝)b, Chen Wei (陈维)b, Chen Hong-Ya (陈红雅)b, Li Yong-Feng (李勇峰)b
摘要: Deep sub-wavelength metamaterials are the key to the further development of practical metamaterials with small volumes and broadband properties. We propose to reduce the electrical sizes of metamaterials down to more sub-wavelength scales by lowering the plasma frequencies of metallic wires. The theoretical model is firstly established by analyzing the plasma frequency of continuous thin wires. By introducing more inductance elements, the effective electron mass can be enhanced drastically, leading to significantly lowered plasma frequencies. Based on this theory, we demonstrate that both the electric and the magnetic plasma frequencies of metamaterials can be lowered significantly and thus the electrical sizes of metamaterials can be reduced to more sub-wavelength scales. This provides an efficient route to deep sub-wavelength metamaterials and will give rigorous impetus for the further development of practical metamaterials.
中图分类号: (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))