3 . on unusual phenomena in the one dimensional alternate structure of left - handed material and right - handed material i found three unusual phenomena for the one dimensional periodic structure consisting both left - handed material and right - handed material 我研究发现一维的正负材料交替的周期性结构有三个和普通的完全由正材料(或者负材料)组成的周期性结构反常的现象。