摘要
利用传输矩阵法计算了一维光子晶体的能带结构和光传输特性,重点讨论了介电常量的虚部为负值时对传输特性的影响。当在介质中掺入具有增益特性的介质时,靠近光子带隙边缘就会出现较强的受激辐射放大。同时,光子晶体的长度和介电常量虚部的大小都会影响晶体的受激辐射。随着虚部数值的增加,受激增强并不是单调递增,而是存在一极值点。
The transfer matrix method is used to calculate the band structures of 1D crystals with complex dielectric constant, in this paper, The authors put emphasis on the case of negative imaginary part. The results show that a large enhancement of stimulated emission appears at the photonic band edges. On the one hand, the stimulated emission is strengthened with the increasing of the photonic crystals＇ priod. On the other hand, when the imaginary part increases to 0. 036, the gain reaches the maximum. The paper＇s conclusion is of use to the experimental study of 1 D crystals.
出处
《量子光学学报》
CSCD
北大核心
2006年第2期109-112,共4页
Journal of Quantum Optics
关键词
传输矩阵
光子晶体
复介电常量
增益
transfer matrix
photonic crystal
complex dielectric constant
gain
