负折射率材料由于其独特的性质引起了人们极大的兴趣.介绍了负折射产生的原理及其奇特性质,着重阐述了实现负折射材料的3种主要方法:双负介质实现负折射、左手介质实现负折射和光子晶体实现负折射.分析了各种方法在实现光频段低损耗负折射材料中的可行性及纳米技术发挥的重大作用.
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