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首页> 外文会议>Conference on Quantum Sensing and Nanophotonic Devices; 20040125-20040129; San Jose,CA; US >Ultra-refraction and negative refraction in metamaterials
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Ultra-refraction and negative refraction in metamaterials

机译：超材料中的超折射和负折射

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摘要

In the recent years, many experimental and theoretical achievements have shown that metamaterials can simulate homogeneous materials with optical index less than unity or even negative. For example, a dielectric photonic crystal, used at the edge of a band gap, can generate phenomena of ultra-refraction (positive index less than unity) or negative refraction (negative index). Some applications of these phenomena will be shown, specially the design of directive antenna in the microwaves region. More recently, experimental and theoretical studies have been published on left-handed materials. These materials, which have a permittivity and a permeability equal to -1, have been the subject of controversies about their alleged property of making perfect lenses. It will be shown that such a perfect lens cannot exist. However, this kind of meta-material could be used for making better lenses than the best classical ones, a fact which could explain some experimental results. The vital influence of the size of the elementary cell on the performance of the lens will be pointed out. Finally, it will be shown that surprisingly, a left-handed material can be interpreted as a means to go through the mirror, as Alice in the novel of Lewis Carroll...
机译：近年来，许多实验和理论成果表明，超材料可以模拟光学指数小于1甚至为负的均质材料。例如，在带隙边缘使用的介电质子光子晶体会产生超折射（正折射率小于1）或负折射（负折射率）的现象。将展示这些现象的某些应用，特别是在微波区域中定向天线的设计。最近，关于左撇子材料的实验和理论研究已经发表。这些材料的介电常数和磁导率等于-1，已成为他们所谓的制造完美镜片的特性的争议对象。将显示出这种完美的镜头不存在。但是，这种超材料可以用来制造比最佳经典透镜更好的透镜，这一事实可以解释一些实验结果。将指出基本单元的尺寸对镜片性能的重要影响。最后，将显示出令人惊讶的是，左撇子材料可以解释为穿过镜子的一种手段，就像刘易斯·卡洛尔小说中的爱丽丝...

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