Broad-band negative refraction via simultaneous multi-electron transitions
Broad-band negative refraction via simultaneous multi-electron transitions
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DOI：
10.1088/2399-6528/aafe4b
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发表时间：
2018-07
影响因子：
1.2
通讯作者：
Jing-jing Cheng;Y. Chu;Tao Liu;Jie-Xing Zhao;Fuguo Deng;Q. Ai;F. Nori
中科院分区：
文献类型：
--
作者：
Jing-jing Cheng;Y. Chu;Tao Liu;Jie-Xing Zhao;Fuguo Deng;Q. Ai;F. Nori
负折射超材料的潜在应用受到其窄带宽和制造难度的限制。为了拓宽带宽，我们分析了影响固体和多原子分子负折射的不同因素。我们发现，通过具有相同跃迁频率的同时多电子跃迁和不同本征态上的偶极子重新分布可以显着增强这种负折射。我们表明，这些同时的多电子跃迁和增强的跃迁偶极子将负折射的带宽拓宽了至少一个数量级。此外，我们还展示了该方案在使用具有 NV 中心的金刚石的双曲超材料中的可能应用。
The potential applications of metamaterials with negative refraction are limited by their narrow bandwidth and difficulty in fabrication. In order to broaden the bandwidth, we analyze different factors which influence the negative refraction in solids and multi-atom molecules. We find that this negative refraction can be significantly enhanced by simultaneous multi-electron transitions with the same transition frequency and dipole redistribution over different eigenstates. We show that these simultaneous multi-electron transitions and enhanced transition dipole broaden the bandwidth of the negative refraction by at least one order of magnitude. Furthermore, we show the possible application of this scheme in hyperbolic metamaterials using diamonds with NV centers.