| 引用本文: | 罗涛,尚方,江岳娈,江滨浩.偶极源辐射超材料表面波的存在条件及特性[J].哈尔滨工业大学学报,2012,44(8):62.DOI:10.11918/j.issn.0367-6234.2012.08.013 |
| LUO Tao,SHANG Fang,JIANG Yue-luan,JIANG Bin-hao.Analysis of surface waves in metamaterials based on dipole radiation sources[J].Journal of Harbin Institute of Technology,2012,44(8):62.DOI:10.11918/j.issn.0367-6234.2012.08.013 |
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| 摘要: |
| 为了更好地利用超材料,需要研究半空间模型中超材料的表面波．利用电磁波反射场的索末菲积分,应用复变函数积分的鞍点法,研究下层介质分别为等离子体、负磁性介质和左手材料时,在竖直电偶极子与磁偶极子的反射场中所含表面波的成分构成与电磁特性．确定了各表面波模式发在的条件,给出了侧面波或吸附表面波模式与入射电磁波的类型、下层介质的等效介电常数等的关系． |
| 关键词: 超材料 表面波 索末菲积分 极点 分支割线 |
| DOI：10.11918/j.issn.0367-6234.2012.08.013 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(5,0); 高等学校博士学科点专项科研基金(20092302110027); 长春师范学院自科合字(2011-009)． |
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| Analysis of surface waves in metamaterials based on dipole radiation sources |
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LUO Tao1,2, SHANG Fang1, JIANG Yue-luan1, JIANG Bin-hao3
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1.School of Electrical Engineering and Automation, Harbin Institute of Technology, 150001 Harbin, China;2.School of Physics, Changchun Normal College,130032 Changchun, China;3.School of Electrical Engineering and Automation, Harbin Institute of Technology, 150001 Harbin, China
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| Abstract: |
| For the better use of metamaterials, the surface waves of metamaterials are studied in half-space model with dipole radiation source. Using the Sommerfeld integrals of TM wave and TE wave, the branch-cut’s effect on the computation of the integrals is investigated based on saddle point algorithm. The distribution and validity of pole points for the integrands is analyzed according to the properties of complex integral. For TM wave, there are lateral wave and Zenneck surface wave in the case of taking left-handed material as substrate; for TE wave, no Zenneck surface wave can exist in any case of metamaterials.[JP] |
| Key words: metamaterial surface wave sommerfeld integral pole point branch-cut |
