Negative refractive index in chiral spiral metamaterials at terahertz frequencies

A three-dimensional chiral metamaterial consisting of arrays of the multi-layered mutually twisted metallic spirals is proposed. We theoretically demonstrate such a chiral spiral structure exhibiting negative refractive index at terahertz frequencies. The chirality with varied refractive index can b...

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Bibliographic Details
Published in:Optik (Stuttgart) 2011-09, Vol.122 (18), p.1676-1679
Main Authors: He, Mingxia, Han, Jiaguang, Tian, Zhen, Gu, Jianqiang, Xing, Qirong
Format: Article
Language:English
Subjects:
Arrays
Chiral metamaterial
Electromagnetic properties
Flexibility
Metamaterials
Negative refractive index
Refractive index
Refractivity
Spirals
Terahertz frequencies
Terahertz frequency
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Summary:A three-dimensional chiral metamaterial consisting of arrays of the multi-layered mutually twisted metallic spirals is proposed. We theoretically demonstrate such a chiral spiral structure exhibiting negative refractive index at terahertz frequencies. The chirality with varied refractive index can be obtained by change of configurations of the structure. The presented design offers flexibility for investigation of electromagnetic properties of chiral metamaterials in the terahertz regime and thus leads to a unique route to terahertz device applications.
ISSN:0030-4026
1618-1336
DOI:10.1016/j.ijleo.2010.10.024