作　　者： ; ;

机构地区： 华南师范大学物理与电信工程学院

出　　处： 《齐齐哈尔大学学报（自然科学版）》 2007年第3期24-28,共5页

摘　　要： 由两种单负(负介电常数或负磁导率)材料交替堆叠而成的一维光子晶体异质结的周期结构中,发现了缺陷模的孪生分裂现象。在此异质结中,仅有一光子晶体存在零有效位相(zero-φeff)带隙。计算结果显示,随着异质结的周期数增加,zero-φeff带隙内的缺陷模将发生分裂,分裂后的缺陷模对称地分布在带隙中央的两侧。当异质结的周期数为偶数时,总能在zero-φeff带隙中找到两缺陷模,其频率与异质结的周期数为2时的缺陷模相同;对应这两缺陷模频率的电场在异质结构中传播时,呈周期的丛生状分布。 Twin defect mode splitting phenomena are found in the periodic arrangement of photonic crystal （PC） heterostructures stacking of single-negative （permittivity- or permeability-negative） materials. The key to designing such heterostructures is that only one of the sub-PC of the heterostructures possess the zero-φeff gap. As the periods of the heterostructure increases, the defect modes inside the zero-φeff gap will split and be located symmetrical on both sides of the midfrequency of the zero-φeff gap. As the period number of the heterostructure are even, it can be always found two defect modes, which frequencies are the same as those when the period number is 2. In additioin,the distribution of the electric field, corresponding to the frequencies of the two defect modes, have a cluster-periodic form.

关 键 词： 光子晶体 缺陷模 传输矩阵法 单负材料

领　　域： [理学] [理学]