Abstract
In this paper, we investigate the propagation of electromagnetic wave in 12-fold symmetric quasiperiod structure employing finite difference time domain (FDTD) method. The quasiperiodic photonic crystal (QPC) consists of a dodecahedral lattice of air holes embedded in a dielectric background. Simulation on wave propagation through a wedge-shaped structure shows that negative refraction can occur at the interface between air and the quasicrystal sample. We further design QPC slab for performance of a high-quality flat lens. Simulation results reveal that non-near-field imaging can be achieved through the QPC slab. TM and TE modes are discussed and both the two modes exhibit the focusing effect. Since the air-hole type QPCs are more easily fabricated and integrated than the dielectric-rod type QPCs, our results might be important to the applications.
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