Open AccessFerrite-based magnetically tunable left-handed metamaterial composed of SRRs and wires
Author(s) -
Lei Kang,
Qian Zhao,
Haixia Zhao,
Ji Zhou
Publication year - 2008
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.16.017269
Subject(s) - metamaterial , materials science , ferrite (magnet) , yttrium iron garnet , split ring resonator , optics , refractive index , magnetic field , optoelectronics , passband , capacitance , negative refraction , band pass filter , physics , electrode , quantum mechanics , composite material
We experimentally demonstrate a magnetically tunable left-handed metamaterial by introducing yttrium iron garnet rods into SRRs/wires array. It shows that the left-handed passband of the metamaterial can be continuously and reversibly adjusted by external dc applied magnetic fields. Retrieved effective parameters based on simulated scattering parameters show that tunable effective refraction index can be conveniently realized in a broad frequency range by changing the applied magnetic field. Different from those tuned by controlling the capacitance of equivalent LC circuit of SRR, this metamaterial is based on a mechanism of magnetically tuning the inductance via the active ambient effective permeability.