Subwavelength resolution of the annular photonic crystal with negative refraction

F. Xia; M. Yun; M. Liu; J. Liang; W. Kong; Y. Wan

doi:10.2971/jeos.2012.12045

Journal of the European Optical Society - Rapid publications, Vol 7 (2012)

Subwavelength resolution of the annular photonic crystal with negative refraction

F. Xia, M. Yun, M. Liu, J. Liang, W. Kong, Y. Wan

Abstract

In this paper, negative refraction in the two-dimensional (2D) hexagonal lattices annular photonic crystal (APC) was theoretically studied. The annular photonic crystal was obtained by introduced circular-air-hole in the core of the Si-rod. The properties of the designed APC, such as photonic band structure, equal-frequency contours (EFCs) and the electric field distribution are analyzed by using Plane Wave Expansion (PWE) method and Finite-Difference Time-Domain (FDTD) method. Numerical simulations show that negative refraction and super-lens imaging can be realized in the designed annular photonic crystal for the normalized frequency from 0.2983(2πc/a) to 0.347(2πc/a). And it was also found that the resolution decreases linearly with the increasing of the inner radius.

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