SUPER-RESOLUTION IMAGING OF THE GRADED PHOTONIC CRYSTAL WITH NEGATIVE REFRACTION

Abstract

In this paper, super-resolution imaging and negative refraction by a two-dimensional (2D) triangular lattices graded photonic crystal (GPC) were studied. The graded photonic crystal (GPC) was obtained by varying the radius in each row so that its efiective refractive index changes along the transverse direction. By using Plane Wave Expansion (PWE) method and Finite-Difierence Time-Domain (FDTD) method, we show that negative refraction and superlensing can be realized in the designed graded photonic crystal. Numerical simulations show that the photonic crystal structures and frequency have an impact on the resolution.