Open AccessElectromagnetic modes in a three-layered structure made of single-negative materials
Author(s) -
Ge Song,
Jing-Ping Xu,
Yuchen Yang
Publication year - 2011
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.60.074101
Subject(s) - quantum tunnelling , mode (computer interface) , dispersion relation , leaky mode , electromagnetic field , condensed matter physics , electromagnetic radiation , transmission (telecommunications) , electric field , materials science , physics , optics , single mode optical fiber , radiation mode , quantum mechanics , telecommunications , laser , computer science , operating system
The modes in a three-layered structure made of single-negative materials have been investigated. For the propagation mode, the tunneling mode can be formed in the structure. When tunneling mode appears the variations of electric field distribution and the transmission with incident angle are studied. We find that there appear two new localized modes when the thickness of the middle layer changes. The frequency interval of the two localized modes can be increased by decreasing the thickness of the middle layer. For the guided mode, the electromagnetic wave is evanescent in semi-infinite vacuum which is on the both sides of the structure. We have analyzed the existence condition of its electromagnetic mode,that is, the dispersion relation. The result shows that a strong local field appears in the interface of the material.