Open AccessNegative effective refraction index in guided wave mode for periodic layered ferrite-dielectric/metallic film composites
Author(s) -
Tianen Zhao,
RuiXin Wu,
Fan Yang,
Pïng Chen
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.179
Subject(s) - materials science , dielectric , ferrite (magnet) , refractive index , composite material , negative refraction , composite number , refraction , dielectric loss , dispersion (optics) , optics , physics , optoelectronics
We have studied the effective refraction index of the guided wave mode in periodic layered ferrite-dielectric/metal film composites. Using the equivalent transmission line approach we have analyzed and calculated the dispersion characters and then the effective refraction index of the composites. We have found that the effective refraction index of the composites will be negative within a certain frequencies only when the wave is in TE mode. The loss of the composite is closely related to the dielectric layers, which can be effectively reduced by decrease the dielectric loss. However, too small dielectric loss results in disappearing of the negative refraction index.