A close-ring pair terahertz metamaterial resonating at normal incidence | Zendy

Jianqiang Gu | Zendy; Jiaguang Han | Zendy; Xinchao Lu | Zendy; Ranjan Singh | Zendy; Zhen Tian | Zendy; Qirong Xing | Zendy; Weili Zhang | Zendy

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A close-ring pair terahertz metamaterial resonating at normal incidence

Author(s) -

Jianqiang Gu,

Jiaguang Han,

Xinchao Lu,

Ranjan Singh,

Zhen Tian,

Qirong Xing,

Weili Zhang

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.020307

Subject(s) - metamaterial , terahertz radiation , split ring resonator , optics , terahertz spectroscopy and technology , negative refraction , refractive index , metamaterial antenna , photolithography , transformation optics , figure of merit , physics , transmission coefficient , resonance (particle physics) , optoelectronics , materials science , transmission (telecommunications) , telecommunications , computer science , directional antenna , antenna (radio) , slot antenna , particle physics

We present a systematic study of a close-ring pair based freestanding metamaterial fabricated by double-layer, self-aligned photolithography. Terahertz time-domain spectroscopy transmission measurements and numerical simulations have revealed negative index of refraction in the frequency range of 0.66-0.90 THz under normal wave incidence. The observed resonance behaviors can be well explained by a theoretical circuit model. The electromagnetic properties and the figure of merit of such close-ring metamaterials are also explored in terms of geometrical parameters of the unit cell with a goal of providing optimized design for three-dimensional metamaterials and potential device applications.

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