二维旋转复式晶格光子晶体绝对带隙的研究

Study on Absolute Photonic Bandgap in Two-Dimensional Compound Lattices Photonic Crystal with Rotating Cylinders

关键词:  二维光子晶体  完全带隙  平面波展开法  复式晶格

Key words:  two-dimensional photonic crystal  absolute bandgap  plane wave expansion method  compound lattices

摘要:

设计一种二维旋转复式晶格光子晶体,利用平面波展开方法计算其带隙结构.结果表明,通过优化参量,该结构具有较大的绝对光子禁带,带隙宽度为0.08538(ka/2πc),禁带宽度与中心频率比值达到17.91%.相对于其它光子晶体结构,该结构更容易产生绝对带隙.

Abstract:

A two-dimensional compound lattices photonic crystal with rotating cylinders is proposed.The bandgap of this structure is calculated by using plan wave expansion method.The result indicate that a large absolute bandgap of this structure can be found by optimizing the parameters, the size of absolute bandgap is 0.08538 and the ratio of the bandgap width to the centre frequency of the bandgap is 17.91%.As to other photonic crystal structure, this structure is easy to form absolute bandgap.