Superlens realized by the two dimensional graded photonic crystal.

Abstract: In this paper, superlens realized by a two-dimensional (2D) triangular lattices graded photonic crystal (GPC) was studied. The graded photonic crystal (GPC) was obtained by varying the radius in each row so that its effective refractive index changes along the transverse direction. Plane wave expansion (PWE) method and finite-difference time-domain (FDTD) were adopted to show that negative refraction and superlens can be realized in the designed graded photonic crystal. [Copyright &y& Elsevier]