【摘要】 最近实验证明周期性的光子晶体中存在电磁波的负折射现象,并且观测到亚波长成像.然而,这些研究主要集中在周期性结构中,对非周期结构的研究还没有相关的报道.文章报道了一种新的理论和实验结果:非周期性十二重准晶光子结构同样存在负折射,并且可以实现超透镜的远场成像.具有这些特性的光子准晶可以广泛的应用于光集成器件中.更多还原

【Abstract】 Recently,negative refraction of electromagnetic waves in photonic crystals was demonstrated experimentally and subwavelength imagingobserved.However,these investigations all focused on the periodic structure.Here we report a new theoretical and experimental finding that negative refraction can occur in certain transparent quasicrystalline photonic structures.More interestingly,a superlens based on 2-dimensional photonic quasicrystals can form a non-near-field subwavelength image whose position varies with the source distance.This property makes such quasicrystals promising for application in a range of optical devices.更多还原