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Wideband slow light with low dispersion in lattice-shifted asymmetric photonic crystal waveguides

机译:晶格位移不对称光子晶体波导中具有低色散的宽带慢光

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摘要

We propose a different type of asymmetric photonic crystal waveguide to achieve slow light with improved normalized delay-bandwidth product and low group velocity dispersion. The lateral symmetry of the proposed waveguide is broken by periodically shifting the two rows of air holes adjacent to the line defect. Under two simple different procedures of shifting air holes, the group indices of 41, 50, 68, and 114 with band-widths over 14.9,11, 7.8, and 4.7 nm, and the group indices of 43, 54, 73, and 124 with bandwidths over 13.9, 10.4, 7.1, and 4.3 nm around 1550 nm are obtained, respectively. Low-dispersion slow light propagation Is confirmed by studying the relative temporal pulse-width spreading with the two-dimensional finite-difference time-domain method.
机译:我们提出了一种不同类型的非对称光子晶体波导,以实现慢光,同时具有改进的归一化延迟带宽积和低群速度色散。通过周期性地移动邻近线缺陷的两排气孔,破坏了所提出的波导的横向对称性。在两个简单的不同气孔移位程序下,带宽分别超过14.9、11、7.8和4.7 nm的组索引41、50、68和114以及组索引43、54、73和124分别获得了1550 nm附近13.9、10.4、7.1和4.3 nm的带宽。通过使用二维时域有限差分法研究相对时间脉宽扩展,可以确认低色散缓慢光的传播。

著录项

  • 来源
    《Optical engineering》 |2014年第9期|097108.1-097108.7|共7页
  • 作者单位

    Central China Normal University, College of Physical Science and Technology, Wuhan 430079, China, Kashi Normal College, Department of Physics, Kashi 844006, China;

    Central China Normal University, College of Physical Science and Technology, Wuhan 430079, China;

    Kashi Normal College, Department of Chemistry and Environmental Science, Kashi 844006, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photonic crystal waveguide; slow light; dispersion;

    机译:光子晶体波导;慢光分散;

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