科研之友
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摘要
Electromagnetic properties of hybrid composite materials containing copper and permalloy (Fe53Ni47 alloy) particles have been investigated in the RF to microwave frequency range up to 20GHz. Double negative permittivity and permeability spectra have been observed in the percolated state of the hybrid composite material. The negative permittivity spectra in this composite can be attributed to the low frequency plasmonic state produced by the percolated Cu and permalloy cluster chains as well as the dielectric resonance of the isolated metal clusters. The refractive index spectra which were calculated from the measured permittivity and permeability data indicated the negative refraction from 200MHz to 1.8GHz. The near zero or zero refractive index state can be obtained near the two zero crossing frequencies in the refractive index spectra. Published by AIP Publishing.
- 出版日期2016-5-9
