有限长金属线结构型电磁特异材料有效媒质品质的衡量

材料导报, 2011, 25(10): 142-145.

1.湖南城市学院物理与电信工程系,益阳413000

2.益阳医学高等专科学校,益阳413000

3.湖南城市学院物理与电信工程系,益阳413000

4.湖南城市学院物理与电信工程系,益阳413000

基金项目: 湖南省高等学校科学研究资助项目(10C0314) 湖南省科技计划资助项目(2010GK3160)

Measure about Quality of the Effective Medium Parameters of the Metamaterial in Cut-Wire Structure

基于广义的相干势近似,将特异材料放入背景材料中,利用格林函数的方法计算电磁特异材料体系的自能、态密度及平均自由程.态密度函数是背景材料的介电常数εref和磁导率μref的函数.通过不断改变背景材料的介电常数εref和磁导率μref,使态密度最大化,从而确定体系的有效媒质参量及有效媒质的品质.

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