Feng Rui, Qiu Jun, Liu Linhua, Ding Weiqiang, Chen Lixue
Opt Express. 2014 Dec 15;22 Suppl 7:A1713-24. doi: 10.1364/OE.22.0A1713.
We perform a comprehensive analysis of multi-band absorption by exciting magnetic polaritons in the infrared region. According to the independent properties of the magnetic polaritons, we propose a parallel inductance and capacitance(PLC) circuit model to explain and predict the multi-band resonant absorption peaks, which is fully validated by using the multi-sized structure with identical dielectric spacing layer and the multilayer structure with the same strip width. More importantly, we present the application of the PLC circuit model to preliminarily design a radiative cooling structure realized by merging several close peaks together. This omnidirectional and polarization insensitive structure is a good candidate for radiative cooling application.
我们通过激发红外区域的磁极化激元对多波段吸收进行了全面分析。根据磁极化激元的独立特性，我们提出了一个并联电感和电容（PLC）电路模型来解释和预测多波段共振吸收峰，这通过使用具有相同介电间隔层的多尺寸结构和具有相同条带宽度的多层结构得到了充分验证。更重要的是，我们展示了PLC电路模型的应用，以初步设计一种通过合并几个相近峰实现的辐射冷却结构。这种全向且对偏振不敏感的结构是辐射冷却应用的理想候选者。
