Eur. Phys. J. B 62, 1-6 (2008)
https://doi.org/10.1140/epjb/e2008-00116-y

Experimental investigation on zero-Ø_eff 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

Abstract

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-Ø_eff) gaps, which are insensitive to the scaling change of the respective unit length. The width and depth of zero-Ø_eff 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.