Open AccessSelectable electromagnetic response modes and negative refraction in rectangular dielectric metamaterials
Author(s) -
Peng Ding,
Qiang Zhou,
Hu Wei-Qin,
Cai Genwang,
Erjun Liang
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.60.054102
Subject(s) - metamaterial , excited state , resonance (particle physics) , resonator , dielectric , excitation , optics , polarization (electrochemistry) , electromagnetic radiation , physics , negative refraction , materials science , atomic physics , optoelectronics , chemistry , quantum mechanics
Dielectric resonator is a kind of important building block for metamaterials. Here, we numerically investigated the resonance modes excited in the dielectric resonator whose cross section has different ratios of the length to width. It is found that the cross-sectional aspect ratio has great influence on the excitation sequence of the resonance modes. The magnetic resonance mode is firstly excited for the aspect ratio smaller than 2.2, whereas it is excited at the second resonance for the ratio lager than 2.2. As the turning point, i. e. with the aspect ratio of 2.2, the magnetic mode cannot be achieved. The calculations also show that the magnetic resonance can be tuned by adjusting the direction of the incident electromagnetic wave, thus achieving the polarization control of electromagnetic response. This study provides valuable information for the design and research of novel dielectric-based metamaterials.