Overcoming Losses with Gain in a Negative Refractive Index Metamaterial
Overcoming Losses with Gain in a Negative Refractive Index Metamaterial
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DOI：
10.1103/physrevlett.105.127401
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发表时间：
2010-09-14
影响因子：
8.6
通讯作者：
Hess, Ortwin
中科院分区：
文献类型：
--
作者：
Wuestner, Sebastian;Pusch, Andreas;Hess, Ortwin
在全矢量三维麦克斯韦-布洛赫方法的基础上，我们研究了利用增益克服负折射率鱼网超材料损耗的可能性。我们表明，适当地将光泵浦激光染料（增益）放置到超材料结构中会导致非双向异性超材料变得放大的频带。在该区域内，有效折射率的实部和虚部同时变为负值，并且在两个不同的频率点处，性能值偏离。
On the basis of a full-vectorial three-dimensional Maxwell-Bloch approach we investigate the possibility of using gain to overcome losses in a negative refractive index fishnet metamaterial. We show that appropriate placing of optically pumped laser dyes (gain) into the metamaterial structure results in a frequency band where the nonbianisotropic metamaterial becomes amplifying. In that region both the real and the imaginary part of the effective refractive index become simultaneously negative and the figure of merit diverges at two distinct frequency points.