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中文摘要：
将损耗型负介电常数材料-光子晶体匹配的异质结构作为基本单元排列成周期性结构,组成一种新型的光栅结构,利用有限元分析方法计算了该结构的透射特性。通过分别对比不同的光栅周期长度以及异质结构在光栅结构中不同占比对透射率的影响,确定了光栅结构的透射率与单独的异质结构相比有显著的提高。同时,通过对电磁场的分析,解释了该光栅结构透射率提高的物理原因,这是由光栅结构对电磁场的周期性调制作用导致的。
英文摘要：
We studied the transmission properties of a new grating structures composite of the matching heterostructure units containing lossy negative epsilon materials and photonic crystals by using finite element analysis. The transmittance was analyzed by comparing various grating period length and the different ratio of heterostructure in grating structures, respectively. The above results show that the transmittance of grating structures dramatically increases compare with the single heterostructure. Simultaneously, we expound the physical reason of the enhanced transmittance from the distribution of electromagnetic fields. That is because of the periodic modulation for electromagnetic fields in the new gating structures.
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