条状物
光学
折射率
超材料
散射
介电常数
棱镜
谐振器
微波食品加热
物理
散射参数
铜
材料科学
分裂环谐振器
负折射
电介质
光电子学
复合材料
量子力学
冶金
作者
Richard A. Shelby,David R. Smith,S. Schultz
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2001-04-06
卷期号:292 (5514): 77-79
被引量:8769
标识
DOI:10.1126/science.1058847
摘要
We present experimental scattering data at microwave frequencies on a structured metamaterial that exhibits a frequency band where the effective index of refraction (n) is negative. The material consists of a two-dimensional array of repeated unit cells of copper strips and split ring resonators on interlocking strips of standard circuit board material. By measuring the scattering angle of the transmitted beam through a prism fabricated from this material, we determine the effective n, appropriate to Snell's law. These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root of epsilon.mu for the frequencies where both the permittivity (epsilon) and the permeability (mu) are negative. Configurations of geometrical optical designs are now possible that could not be realized by positive index materials.
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