含吸收型色散介质的光子晶体的腔极化激元研究  

Research on polaritons in photonic crystal with absorptive type of dispersive medium's layer

作　　者：颜根英[1] 汪先明[2] 于天宝[2,3] 石哲[2] 廖清华[2] 

机构地区：[1]井冈山学院物理系,江西吉安343000 [2]南昌大学物理系,江西南昌330047 [3]浙江大学信息与电子工程学系

出　　处：《量子电子学报》2006年第5期665-670,共6页Chinese Journal of Quantum Electronics

基　　金：江西省自然科学基金(0212004)资助课题

摘　　要：对色散介质层采用洛仑兹振子模型,通过考虑色散介质层两边的边界条件,可以严格得到表征色散介质层的转移矩阵。通过改变介质层的不同参数,详细研究了含吸收型色散介质的对称光子晶体的腔极化激元。研究发现吸收型色散微腔和增益型色散微腔在简正模耦合,无定型展宽效应和失谐效应方面都可以表现出大致相似的性质,但其在透射强度和耦合模频率飘移方面都有着明显的不同。最后对同时含有吸收型色散介质层和Kerr非线性层的一维对称光子晶体的光双稳行为进行了研究,发现其形成双稳态所需的阈值入射光强比仅含Kerr非线性层的阈值入射光强有所降低。The transfer matrix, which represents the dispersive medium＇s layer, can be rigorously obtained by using Lorentz model and considering boundary conditions. The detailed investigation on polaritons in a symmetric photonic crystal with absorptive type of dispersive medium＇s layer is presented by adjusting parameters of the dispersive medium＇s layer. It＇s found that the absorptive type of dispersive cavity and reinforced dispersive cavity may demonstrate similar properties in normal modes coupling, the homogeneous broadening effect, and the detuning effect. But there exists evident differences in transmitted intensity and frequency shift. Finally, the optical bistability in one-dimensional symmetric photonic crystal both with absorptive type of dispersive medium＇s layer and with Kerr nonlinear layer is also investigated. It＇s found that optical bistability threshold of the photonic crystal with dispersive medium layer is a little lower than that of structure without dispersive medium layer.

关 键 词：量子光学 耦合 光学双稳态 转移矩阵 色散介质 

分 类 号：O439[机械工程—光学工程]