具有分形特征的二维金属型光子晶体带隙特性

Study of a Two Dimensional Metal Photonic Crystal Band-gap with Fractal Characteristics

采用空域有限差分法模拟了(Vicsek-分形结构和Von-雪花分形结构)具有分形特征的二维金属型光子晶体的带隙特性。结果发现采用分形结构后,光子晶体产生了与谐振无关的多频段带隙甚至出现了完全带隙,带隙宽度得到了进一步展宽,为设计多频段光子晶体带隙提供了一条新的途径。

Fractal two-dimensional metal electromagnetic band-gap（EBG） structures which include Vicsek and Von snow-like fractal structures are proposed in this paper.The finite difference space domain（FDSD） method is used to simulate the band-gap characteristic of the two kind fractal EBG structures.The numerical results show that typical effects like multi-band even complete band-gap behavior are observed due to using the fractal geometry,and this provides a new method to design multi-frequency band-gap.