发光学报2009，Vol.30Issue(4)：441-446,6.
左手介质矩形波导的吸收特性
Absorption Property in Rectangular Waveguide with Left-handed Material
摘要
Abstract
In this paper, the absorption property of the left-handed material (LHM) rectangular waveguide was studied by use of the perturbation method, and other novel properties were revealed. Due to the restriction of the dispersion equations, the LHM waveguide can not support the fundamental modes, and its absorption property is quite different from that of RHM (right-handed material) rectangular waveguide. It was shown that Ey11 modes attenuation coefficient changes from large to small as the length to width ratio (a/b) grows, while the result is reverse in RHM rectangular waveguide. In addition, when different modes are propagating in the same LHM waveguide there is an absorption peak for every mode, and in a small neighborhood of this peak, an attenuation trough can be found. In this case, higher-order modes possess larger attenuation coefficient than lower-order modes. But, when different modes are propagating in the RHM waveguide the attenuation curves are changing vibrantly and approach the core attenuation coefficient with the increasing of the width b. Otherwise, higher-order modes possess smaller attenuation coefficients than lower-order modes in RHM waveguide.关键词
吸收峰/衰减谷/衰减系数/微扰法/矩形波导Key words
absorption peak/attenuation trough/attenuation coefficient/perturbation method/rectangular waveguide分类
信息技术与安全科学引用本文复制引用
唐婷婷,陈福深..左手介质矩形波导的吸收特性[J].发光学报,2009,30(4):441-446,6.基金项目
国家自然科学基金(60771045)资助项目The project supported by National Natural Science Foundation of China(60771045) （60771045）
