双周期厚度调制的一维光子晶体的电磁模  

Electromagnetic modes of thickness-modulated dual-periodic one-dimensional photonic crystals

作　　者：周金苟[1] 杜桂强[2] 张亚文[2] 刘念华[3] 

机构地区：[1]井冈山学院物理系,吉安343009 [2]哈尔滨工业大学威海校区应用物理系,威海264209 [3]南昌大学物理系,南昌330047

出　　处：《物理学报》2005年第8期3703-3706,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60268001);江西省自然科学基金(批准号:0312004)资助的课题.~~

摘　　要：计算了厚度调制的双周期一维光子晶体的能带.当一维光子晶体的厚度被周期性地调制时,原来的能带分裂为许多子能带,其中一些很窄的子能带进入了原来的单周期光子晶体的带隙内.这些窄带内的电磁模的场强具有双周期性分布的特点,并有较强的局域性.在较宽的子能带中的电磁模是扩展的.We have studied the photonic band of dual-periodic one-dimensional(1D) photonic crystals. The band splits into many subbands when we modulate periodically the thickness of the unit of the 1D photonic crystal. Some narrow bands appear in the gap of the simple photonic crystal with single-period. The field of the electromagnetic modes in the split bands exhibits dual-periodicity. The modes in the narrow bands are localized, but those in the wider bands are extended.

关 键 词：一维光子晶体 电磁 调制 周期厚度 子能带 周期性 双周期 单周期 局域性 分裂 带隙 

分 类 号：O734[理学—晶体学] TM33[电气工程—电机]