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

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 the...

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Published inChinese physics B Vol. 22; no. 8; pp. 589 - 595
Main Author 秦刚 王甲富 闫明宝 陈维 陈红雅 李勇峰
Format Journal Article
LanguageEnglish
Published 01.08.2013
Subjects
Broadband
Electric wire
Electron mass
Inductance
Metamaterials
Plasma frequencies
亚波长
宽带性能
材料
电子有效质量
电感元件
等离子体频率
路由
金属导线
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/8/087302

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Summary: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.
Bibliography:Qin Gang, Wang Jia-Fu, Yan Ming-Bao, Chen Wei, Chen Hong-Y, and Li Yong-Feng a） College of Electronic Information Engineering, Xi＇ an Technological University, Xi＇ an 710032, China b） College of Science, Air Force Engineenng University, Xi＇ an 710051, China
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.
11-5639/O4
metamaterials, deep sub-wavelength, plasma frequency, effective electron mass
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SourceType-Scholarly Journals-1
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/8/087302