掺杂非线性吸收介质的光子晶体的双稳态特性  

Bistability of Photonic Crystals with Defects of Nonlinear Absorption Dielectric Materials

作　　者：黄晓琴[1] 崔一平[1] 

机构地区：[1]东南大学电子工程系,江苏南京210096

出　　处：《光电子．激光》2003年第1期58-61,共4页Journal of Optoelectronics·Laser

摘　　要：从光子晶体的传输矩阵理论出发 ,推导了掺杂饱和吸收非线性介质的光子晶体的缺陷模的透射率 ,以及缺陷层中局域光的增强因子。计算表明 ,基于非线性介质透过率的感应变化和透过率的正反馈作用 ,掺杂非线性吸收介质的一维光子晶体具有双稳态特性 ;实现双稳态所需的入射光强阈值决定于光子晶体的折射率参数、掺杂介质的饱和吸收光强 ,并随光子晶体的周期数 N的增大而指数减小。The transmittance of defect mode in one dimension photonic crystals with nonlinear absorptional dielectric materials was deduced by the transfer matrix theory.The intensity enhancement factor of localized light in defect layer had also been obtained,which increases exponentially with the number of layers in a photonic crystal.The numerical calculation shows that a photonic crystal with saturable absorption dielectric materials in the defect layer has the property of bistablility.The threshold of input intensity to bring about bistablility is decided by parameters of refractivity?saturation intensity of defect layer and decreases exponentially with the number of layers in a photonic crystal.

关 键 词：光子晶体 非线性 双稳态 掺杂介质 折射率 

分 类 号：TN204[电子电信—物理电子学]