Tamm states of one-dimensional photonic crystal based on surface defect

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 基于表面缺陷一维光子晶体Tamm态的研究 DOI: 作者: 作者单位: 江苏大学计算机科学与通信工程学院 镇江,江苏大学计算机科学与通信工程学院 镇江,宁波大学物理系 宁波 作者简介: 通讯作者: 中图分类号: 基金项目: 《应用非线性科学与技术》浙江省重中之重学科开放基金(No.xkz11012)； Tamm states of one-dimensional photonic crystal based on surface defect Author: Affiliation: School of Computer Science and Telecommunication Engineering,School of Computer Science and Telecommunication Engineering,Department of Physics, Ningbo University Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:基于周期结构的布洛赫原理，从电磁场理论出发，用解析和数值的方法系统地研究了基于表面缺陷的半无限一维光子晶体Tamm态的形成条件，模式特征以及与无缺陷Tamm态之间的关系.对TE波，缺陷Tamm态的频率范围向高低两个方向扩大；而对TM波，缺陷Tamm态的频率范围只向高频扩大, 而低频范围减小.缺陷折射率较大时, 缺陷Tamm态的色散曲线近似直线, 其群速度大小也近似等于光在单层缺陷里的传播速度. 通过调节缺陷层的折射率或者厚度可以方便地把缺陷Tamm态的频率设计到需要的范围. Abstract:Based on the Bloch theory of periodic structure, the Tamm states of semi-infinite one-dimensional photonic crystal with surface defect (the defect Tamm states) were studied through analytical and numerical methods. The forming condition and field properties of the defect Tamm states was obtained. The properties of the defect Tamm states and the Tamm states without defect was also compared. For TE wave, the frequency range of defect Tamm state is enlarged to both high frequency and low frequency; for TM wave, the frequency range of defect Tamm state is only enlarged to high frequency, but is narrowed in low frequency. For large refraction index of defect material, the dispersion curve of Tamm state is close to a straight line and the group velocity is close to that light velocity in the single defect layer. The frequency of the defect Tamm state can be adjusted into our needed range by changing the refraction index or thickness of the defect layer. 参考文献 相似文献 引证文献