https://doi.org/10.1140/epjb/e2008-00116-y
Experimental investigation on zero-Øeff gaps of photonic crystals containing single-negative materials
1
Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, P.R. China
2
School of Electronics and Information, Tongji University, Shanghai, 200092, P.R. China
Corresponding author: a yewenzhang@online.sh.cn
Received:
3
May
2007
Revised:
18
January
2008
Published online:
19
March
2008
Epsilon-negative (ENG) and mu-negative (MNG) materials are successfully realized by using composite right/left-handed transmission line (CRLH TL), based on which the photonic crystals were also constituted. The simulated and measured scattering parameters and phase shift indicate that the photonic crystals containing single-negative (SNG) materials can possess zero-effective phase (zero-Øeff) gaps, which are insensitive to the scaling change of the respective unit length. The width and depth of zero-Øeff gaps can be adjusted by varying the ratio of the length of ENG and MNG materials. The characteristics can be utilized to design a compact high quality factor (high-Q) filter, which is demonstrated by a defect mode in the photonic crystals in experiments.
PACS: 42.70.Qs – Photonic bandgap materials / 78.20.Ci – Optical constants / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008