Open AccessTunable dual-band negative refractive index in ferrite-based metamaterials
Author(s) -
Kaiming Bi,
Ji Zhou,
Haixia Zhao,
Xiaoming Liu,
Chuwen Lan
Publication year - 2013
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.010746
Subject(s) - metamaterial , ferrite (magnet) , materials science , microwave , optics , refractive index , split ring resonator , negative refraction , relative permeability , metamaterial antenna , frequency band , optoelectronics , physics , composite material , directional antenna , telecommunications , antenna (radio) , quantum mechanics , porosity , computer science , slot antenna
A tunable dual-band ferrite-based metamaterial has been investigated by experiments and simulations. The negative permeability is realized around the ferromagnetic resonance (FMR) frequency which can be influenced by the dimension of the ferrites. Due to having two negative permeability frequency regions around the two FMR frequencies, the metamaterials consisting of metallic wires and ferrite rods with different sizes possess two passbands in the transmission spectra. The microwave transmission properties of the ferrite-based metamaterials can be not only tuned by the applied magnetic field, but also adjusted by the dimension of the ferrite rods. A good agreement between experimental and simulated results is demonstrated, which confirms that the tunable dual-band ferrite-based metamaterials can be used for cloaks, antennas and absorbers.