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一种新型无色散慢光光子晶体薄板波导
  • ISSN号：1000-3290
  • 期刊名称：物理学报
  • 时间：0
  • 页码：2820-2826
  • 语言：中文
  • 分类：O734[理学—晶体学]
  • 作者机构：[1]北京邮电大学信息光子学与光通信教育部重点实验室,北京100876, [2]宁夏大学物理电子信息学院,银川750021
  • 相关基金：国家自然科学基金（批准号：60932004 60707001）; 国家重点基础研究发展计划（批准号：2007CB310705）; 国家高技术研究发展计划（批准号：2009AA01Z256）; 宁夏大学科研基金（批准号：ZR200801）资助的课题
  • 相关项目：非线性微结构中的孤子和混沌现象研究及其应用探索
作者： 纪越峰|沈宏君|田慧平|
关键词： 光子晶体薄板波导, 群速度, 群指数, 群速度色散, photonic crystal slab waveguide, group velocity, group index, group velocity dispersion
中文摘要：

利用椭圆形孔替代传统光子晶体薄板波导中邻接波导的最内层两排圆孔构成一种新型低损耗光子晶体薄板光波导.该波导的群速度和群速度色散特性强烈依赖于波导中这两排邻接波导的椭圆孔的特性.借助波导导模展开方法,计算得到波导的能带结构和群指数,并分析了它们与椭圆孔的参数关系.通过优化这些椭圆孔的参数,可以增加光子晶体光波导导模在光锥以下的无固有传输损耗带宽,在2—4.5nm的带宽上实现无色散的常数群速度.这些理论结果将为低损耗低色散慢光波导的设计制造提供理论基础.

英文摘要：

We report a low loss photonic crystal slab waveguide formed by deforming the innermost holes on either side of a single line defect so that the circular air holes are changed to elliptical holes.The group velocity and group velocity dispersion of this waveguide depend strongly on the innermost elliptical air holes.We obtain the photonic bands and group index of guided modes in this kind of photonic crystal waveguide by guided mode expansion method and investigate the dependence of photonic bands and group index of guided modes in this photonic crystal waveguide on the parameter of the innermost elliptical air holes.For waveguides with the optimum innermost elliptical air holes,we achieved a wider single mode region below the light line,in which light can easily propagate without intrinsic loss.At the same time,this kind of waveguide has nearly constant group velocity and vanishing group velocity dispersion in a 3—5 nm bandwidth.These results will be applicable to design and fabricate photonic crystal slab waveguides with low group velocity,low dispersion and low loss characteristics.

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期刊信息
  • 《物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国物理学会 中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京603信箱(中国科学院物理研究所)
  • 邮编：100190
  • 邮箱：apsoffice@iphy.ac.cn
  • 电话：010-82649026
  • 国际标准刊号：ISSN：1000-3290
  • 国内统一刊号：ISSN：11-1958/O4
  • 邮发代号:2-425
  • 获奖情况:
  • 1999年首届国家期刊奖,2000年中科院优秀期刊特等奖,2001年科技期刊最高方阵队双高期刊居中国期刊第12位
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  • 被引量:49876