...
首页> 外文期刊>Optics Letters >Interface states and bound states in the continuum in photonic crystals with different lattice constants
【24h】

Interface states and bound states in the continuum in photonic crystals with different lattice constants

机译:界面状态和绑定状态在具有不同晶格常数的光子晶体中的连续体中的绑定状态

获取原文
获取原文并翻译 | 示例
           

摘要

The existence of interface states at the boundary of two semi-infinite photonic crystals (PhCs) with different lattice constants are investigated systematically. Compared to the interface states in the two PhCs with the same period, a band folding effect is observed for the interface states inside the common band gap of the two PhCs with different lattice constants. We demonstrate that these interface states can be predicted by the surface impedance of the two PhCs. The dispersion of interface states can be determined by the condition of impedance matching combined with the band folding effect. Moreover, some part of the folded interface states penetrates the region of projected bulk bands, and they usually leak to the bulk and form resonant states. However, the interface state at the Gamma point can be perfectly localized and becomes a bound state in the continuum (BIC) due to the symmetry mismatch. These findings may provide a general scheme for designing BICs in the PhC structures based on the interface states. (C) 2020 Optical Society of America
机译:系统地研究了具有不同晶格常数的两个半无限光子晶体(PHC)的边界处的界面状态。与具有相同时段的两个PHC中的接口状态相比,对于具有不同晶格常数的两个PHC的公共带隙内的接口状态,观察到带折叠效果。我们证明这些接口状态可以通过两个PHC的表面阻抗预测。接口状态的分散可以通过与带折叠效果组合的阻抗匹配的条件来确定。此外,折叠界面状态的一些部分穿透投射散装频带的区域,并且它们通常泄漏到散装并形成谐振状态。然而,由于对称错配,伽马点处的接口状态可以是完全本地化的并且成为连续体(BIC)中的绑定状态。这些发现可以提供用于基于接口状态在PHC结构中设计BIC的一般方案。 (c)2020美国光学学会

著录项

  • 来源
    《Optics Letters》 |2020年第20期|共4页
  • 作者单位

    Chongqing Univ Coll Phys Chongqing 400044 Peoples R China;

    Mianyang Normal Univ Dept Math &

    Phys Mianyang 621000 Sichuan Peoples R China;

    Chongqing Univ Coll Phys Chongqing 400044 Peoples R China;

    Chongqing Univ Coll Phys Chongqing 400044 Peoples R China;

    Chongqing Univ Coll Phys Chongqing 400044 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号