Tunable wide-angle plasmonic perfect absorber at visible frequencies
Tunable wide-angle plasmonic perfect absorber at visible frequencies
复制标题
可见光频率下可调谐广角等离子体完美吸收器
DOI：
10.1103/physrevb.85.245401
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发表时间：
2012-06-01
影响因子：
3.7
通讯作者：
Nordlander, Peter
中科院分区：
文献类型：
--
作者：
Fang, Zheyu;Zhen, Yu-Rong;Nordlander, Peter
我们报道了一种理想的吸收体金属孔阵列，在可见光区具有宽角度近单位吸收。该结构的周期性使得能够激发表面等离子体激元，并导致吸收峰分裂。基于微扰理论的分析形式主义提供了与实验数据吻合良好的结果，并显示了吸收峰如何可以调整孔的几何形状，周期性和材料参数。可扩展到更复杂的混合结构，我们的结果是重要的光子捕获器件和热发射器的发展。
We report a perfect absorber metallic hole array with wide-angle near unity absorbance in the visible regime. The periodicity of the structure enables excitation of surface-plasmon polaritons and results in a splitting of the absorbing peaks. An analytical formalism based on perturbation theory provides results in good agreement with experimental data and shows how the absorption peak can be tuned with hole geometry, periodicity, and material parameters. Being extendable to more complex hybrid structures, our result is important for the development of photon harvesting devices and thermal emitters.