摘要
利用平面波展开法对二维六角晶格结构磁性光子晶体的带隙特性进行了研究,给出其能带结构分布图,并与非磁性介质构成的光子晶体进行了比较.结果表明,由磁性材料构成的光子晶体更易出现带隙,磁导率对带隙结构影响很大.空气背景磁性散射子情况,磁导率增加较小时,二个绝对光子带隙宽度逐渐减小,直至消失.继续增加磁导率,在较低频率范围内出现一个绝对光子带隙,占空比逐渐加大,且最佳填充系数基本保持不变.磁性背景空气散射子,类似地在较低频率范围内也出现了一个绝对光子带隙.磁性背景非磁性散射子与空气背景磁性散射子情况相似.
The effects of magnetic permeability on photonic band gap structures in 2D photonic crystals with hexagonal-arrayed scatters were studied by using plane wave expansion method. It was found that the photonic band gaps tended to exist in the magnetic photonic crystals,and magnetic percneability affected on the photonic band gaps strongly. The width of two absolute band gaps was reduced to vanish by lower magnetic permeability increased in photonic crystals with magnetic scatters surrounded by air. For higher magnetic permeability,an absolute band gap could appear in the lower frequency, and gap-mid-gap ratio increased and optimal fill ratio changed lightly. Analogously, an absolute band gap also appeared in the lower frequency in photonic crystals with air scatters surrounded by magnetic material. And the results show that the characteristic in photonic crystals with dielectric scatters surrounded by magnetic material is analogical with that in photonic crystals with magnetic scatters surrounded by air.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2007年第10期1808-1812,共5页
Acta Photonica Sinica
基金
高等学校优秀青年教师教学和科研奖励计划基金(158110330001)资助
关键词
光子晶体
光子带隙
磁性材料
能带图
Photonic crystal
Photonic band gap
Magnetic material
Band map
