Open AccessElectrically controllable fishnet metamaterial based on nematic liquid crystal
Author(s) -
Fuli Zhang,
Weihong Zhang,
Qian Zhao,
Jingbo Sun,
Kepeng Qiu,
Ji Zhou,
D. Lippens
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.001563
Subject(s) - liquid crystal , metamaterial , materials science , optics , permittivity , passband , refractive index , electric field , microwave , void (composites) , optoelectronics , dielectric , band pass filter , physics , composite material , quantum mechanics
A variable index metamaterial is demonstrated by embedding nematic liquid crystal inside fishnet layers' void at microwave frequencies. With an external electric field, the left handed passband can be reversibly shifted from 9.14 to 8.80 GHz, whereas the upper right handed passband is nearly unchanged. It is shown that during LC molecular reorientation, magnetic resonance is shifted to a lower frequency because of the permittivity increase between fishnet layers, leading to an effective index change of 1.1 within negative index regime.