Eur. Phys. J. B 64, 219-229 (2008)
https://doi.org/10.1140/epjb/e2008-00307-6

Analysis of photonic band gaps in a two-dimensional photonic crystal with centrifugal core-shell rods

¹ The Department of Physics, Wuhan University, Wuhan 430072, P.R. China
² Key Laboratory of Acoustic and Photonics Material and Devices, Ministry of Education-Wuhan, Wuhan 430072, P.R. China

Corresponding author: ^a dzyao@whu.edu.cn

Received: 6 May 2007
Revised: 4 May 2008
Published online: 30 July 2008

Abstract

The absolute photonic band gap (PBG) in two-dimensional (2D) photonic crystal with excentric core-shell rods is studied in this paper. The core rod shifts away from the core-shell rod center, and its position is decided by two new introduced parameters – the shift angle θ and the offset ρ. We use the FDTD algorithm to calculate the photonic bands of the photonic crystal, and analyze how the offset and shift angle affect the photonic bang gap of excentric core-shell photonic crystal for different core rod size. It has been shown that the variation of the photonic band gap is quite peculiar.