High-order localized spoof surface plasmon resonances and experimental verifications.

High-order localized spoof surface plasmon resonances and experimental verifications.
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高阶局域欺骗表面等离子体共振及实验验证

DOI:
10.1038/srep09590
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发表时间:
2015-04-15
期刊:
影响因子:
4.6
通讯作者:
Cui TJ
Cui TJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Liao Z;Luo Y;Fernández-Domínguez AI;Shen X;Maier SA;Cui TJ

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我们从理论上论证并实验验证了织构金属粒子支持的高阶径向欺骗局域表面等离子体共振。通过有效媒质理论和精确的数值模拟,我们证明了这些几何起源的电磁模式在微波频率下的出现。在超薄圆盘中实验验证了高阶径向欺骗等离子体共振的发生。对它们的光谱和近场性质进行了实验表征,结果与理论预测符合得很好。我们的发现揭示了假冒局域表面等离子激元的本质,并为设计能够在非常不同的频率下工作的宽带等离子体激元装置开辟了道路。
We theoretically demonstrated and experimentally verified high-order radial spoof localized surface plasmon resonances supported by textured metal particles. Through an effective medium theory and exact numerical simulations, we show the emergence of these geometrically-originated electromagnetic modes at microwave frequencies. The occurrence of high-order radial spoof plasmon resonances is experimentally verified in ultrathin disks. Their spectral and near-field properties are characterized experimentally, showing an excellent agreement with theoretical predictions. Our findings shed light into the nature of spoof localized surface plasmons and open the way to the design of broadband plasmonic devices able to operate at very different frequency regimes.
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