一维光子晶体平板波导特性研究
首发时间:2007-12-27
摘要:将一维光子晶体平板波导等效为“光子晶体+衬底(波导层)+光子晶体”的“三明治”结构。采用传输矩阵法分析了电磁波正入射时光子晶体的禁带特性,其第一禁带中心频率为86.3THz,第一禁带宽度为73THz-99THz。同时,根据多层介质平板波导理论分析方法研究了频率在第一禁带范围内的电磁波在一维光子晶体平板波导中的传输特性。研究结果表明,波导传输的是TE和TM主模,对于高次模式,不能在波导中传输;另外,TE主模的功率约束因子Γ在0.99-1之间,说明电磁场完全约束在波导层内,与光子晶体理论预期结果一致。
关键词: 光子晶体平板波导 光子禁带 传输模式 功率约束因子
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Analysis of one-dimensional photonic crystal planar waveguide
Abstract:one-dimensional photonic crystal planar waveguide is presented as sandwich structure of a dielectric planar guide stacked by one-dimensional photonic crystals consisting of a periodic multilayer planars. Transfer matrix method (TMM) is used to analyze stop band property of one-dimensional photonic crystals at the normal incidence for electromagnetic wave, its first stop band lies in the range of 73 THz-99 THz. Additionally, transmission properties of one-dimensional photonic crystal planar waveguide in the range of 73 THz-99 THz is investigated based on multilayer dielectric planar waveguide analysis method. The results show that only TE and TM main modes can propagate in waveguide, furthermore, power constrained factor (Γ) is in 0.99-1, in other words, electromagnetic wave at 73 THz-99 THz is fully constrained in dielectric planar guide, which is coined with the prediction property of photonic crystals.
Keywords: photonic crystal planar waveguide, photonic band-gap, guidance mode, powder constrained factor
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No.1747118022711987****
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