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We obtain the photonic bands and intrinsic losses for the triangular lattice three-component two- dimensional (2D) photonic crystal (PhC) slabs by expanding the electromagnetic field on the basis of waveguide modes of an effective homogeneous waveguide. The introduction of the third component into the 2D PhC slabs influences the photonic band structure and the intrinsic losses of the system. We examine the dependences of the band gap width and gap edge position on the interlayer dielectric constant and interlayer thickness. It is found that the gap edges shift to lower frequencies and the intrinsic losses of each band decrease with the increasing interlayer thickness or dielectric constant. During the design of the real PhC system, the effect of unintentional native oxide surface layer on the optical properties of 2D PhC slabs has to be taken into consideration. At the same time, intentional oxidization of macroporous PhC structure can be utilized to optimize the design. 相似文献
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研究了飞秒光泳冲在光纤中传输时自频移的抑制问题;获得了在带宽限制放大器和非线性增益共同作用下脉宽与频移不随距离变化的近似稳态解。利用线性菌定性分析,获得了该菌态解的线性菌定条件。最后数值模拟了该稳态解在光纤系统中的传输,结果表明该菌态解在光纤系统中可稳定传输,喇曼自频移效应得到了较好的抑制。 相似文献
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