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Negative Refraction of a Symmetrical π-shaped Metamaterial

Yan Chang-Chun1,2, Cui Yi-Ping1, Wang Qiong1 and Zhuo Shing-Chuang1

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A symmetrical π-shaped metamaterial is investigated. Numerical simulations exhibit the negative-refractive property of this structure. The complex refractive index n, wave impedance z, effective permittivity in and effective permeability μ have been retrieved from the simulated S parameters. The negative-refractive band lies between 11.2GHz and 13.05GHz. The frequency band with high transmission with low loss occurs between 11.95GHz and 12.5 GHz, which is helpful for practical applications. The mechanism of the electromagnetic resonance is also revealed.


PACS

42.70.-a Optical materials

78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

77.22.Ch Permittivity (dielectric function)

Subjects

Condensed matter: electrical, magnetic and optical

Optics, quantum optics and lasers

Dates

Issue 2 (February 2008)

Received 9 November 2007



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