光子晶体波导慢光特性研究
Slow-Light Characteristics of Photonic Crystal Waveguides
查看参考文献24篇
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文摘
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基于二维三角晶格空气孔光子晶体,通过在光子晶体单线缺陷波导两侧引入不同的耦合腔,设计了慢光特性较好的波导结构.利用平面波展开法计算波导的色散曲线,并分析慢光模式的群速度和群速度色散特性.耦合腔采用单缺陷腔时,适当调节波导宽度可以获得在零色散点群速度为0.0128c的慢光模式,对应在1.55μm波长处的带宽为409GHz.耦合腔采用长轴与波导方向呈60°的双缺陷腔,在超原胞大小为4a×9b(a,b分别为光子晶体在x,y方向的周期)时,通过调整波导宽度,可以获得在零色散点群速度为0.0070c的慢光模式,对应在1.55μm波长处的带宽为226GHz.进一步增大沿波导方向上双缺陷腔之间的距离,可以获得在零色散点群速度为0.0011c的慢光模式.同时可以根据具体情况选择合适的波导宽度参数,设计满足不同要求的慢光波导结构 |
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其他语种文摘
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Based on two-dimensional triangular lattice air-hole photonic crystal,a kind of waveguide structure with good slow-light characteristics is proposed by inducing coupled-cavity on both sides of the photonic crystal single-line defected waveguides. The energy-band structure, group velocity and group-velocity dispersion characteristics of slow-light mode are analyzed by plane wave expansion method. For the waveguide structure using single-defect cavity as coupled cavity, the group velocity of 0.0128c at the zero-dispersion point with the bandwidth of 409 GHz in the 1.55 μm wavelength could be obtained by appropriately adjusting the waveguide width. As for the waveguide structure using two-defect cavity as coupled cavity with the super-cell of 4a×9b, the group velocity can reach 0.0070c at the zero-dispersion point with the bandwidth of 226 GHz in the 1.55 μm wavelength by adjusting the waveguide width. To further increase the distance between the two-defect cavities, the slow-light mode with group velocity of 0.0011c at the zero-dispersion point could be obtained. Besides, the slow-light waveguide can meet different requirements by selecting the appropriate width of waveguide |
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来源
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光学学报
,2011,31(1):180-185 【核心库】
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关键词
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光通信
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光子晶体波导
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平面波展开法
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慢光
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零色散点
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地址
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中国科学院半导体研究所, 集成光电子学国家重点联合实验室, 北京, 100083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2239 |
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学科
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电子技术、通信技术 |
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基金
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国家973计划
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国家自然科学基金
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文献收藏号
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CSCD:4114419
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24
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