Lowering plasma frequency by enhancing the effective mass of electrons：A route to deep sub-wavelength metamaterials

doi:10.1088/1674-1056/22/8/087302

Abstract 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.

Keywords: metamaterials deep sub-wavelength plasma frequency effective electron mass

Received: 11 December 2012
Revised: 19 January 2013
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)
	77.22.-d	(Dielectric properties of solids and liquids)
	84.90.+a	(Other topics in electronics, radiowave and microwave technology, and direct energy conversion and storage)

Fund: Project supported by the National Natural Science Foundation of China (Grants Nos. 11204378 and 11274389) and the Natural Science Foundation of Shaanxi Province, China (Grant No. 2011JQ8031).

Corresponding Authors: Wang Jia-Fu
E-mail: wangjiafu1981@126.com

Cite this article:

Qin Gang (秦刚), Wang Jia-Fu (王甲富), Yan Ming-Bao (闫明宝), Chen Wei (陈维), Chen Hong-Ya (陈红雅), Li Yong-Feng (李勇峰) Lowering plasma frequency by enhancing the effective mass of electrons：A route to deep sub-wavelength metamaterials 2013 Chin. Phys. B 22 087302

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Lowering plasma frequency by enhancing the effective mass of electrons：A route to deep sub-wavelength metamaterials

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