三角晶格二维光子晶体带隙结构数值研究

为了详细研究三角晶格二维光子晶体的带隙结构特性,采用平面波展开法对该类光子晶体的能带结构作数值研究,计算不同参数下三角二维光子晶体的能带曲线.结果表明,三角二维光子晶体介质基质中空气柱结构比空气基质中介质柱结构在柱体半径相同时更容易形成完全禁带.特别对TE模式而言两种结构都较容易形成禁带,介质基质中的空气柱结构不存在完全禁带.

Numerical Study on Band Gap Structure in Triangular Lattice Two-dimensional Photonic Crystal

This paper applies plane wave expansion method to calculate band gap structure of triangular lattice two-dimensional adulteration photonic crystal.The calculated results obviously show that band gap exists.Wholly band gap forming is easier for air cylinder in medium than medium cylinder in air.Band gap forming is easy for TE model than TM model at two cases.No wholly band gap exists at medium cylinder in air.