Brûlé Y, Demésy G, Fehrembach A-L, Gralak B, Popov E, Tayeb G, Grangier M, Barat D, Bertin H, Gogol P, Dagens B
Appl Opt. 2015 Dec 10;54(35):10359-68. doi: 10.1364/AO.54.010359.
Plasmonic resonances in metallic nanoparticles are exploited to create efficient optical filtering functions. A finite element method is used to model metallic nanoparticle gratings. The accuracy of this method is shown by comparing numerical results with measurements on a two-dimensional grating of gold nanocylinders with an elliptic cross section. A parametric analysis is then performed in order to design efficient filters with polarization dependent properties together with high transparency over the visible range. The behavior of nanoparticle gratings is also modeled using the Maxwell-Garnett homogenization theory and analyzed by comparison with the diffraction of a single nanoparticle. The proposed structures are intended to be included in optical systems that could find innovative applications.
利用金属纳米颗粒中的等离子体共振来创建高效的光学滤波功能。采用有限元方法对金属纳米颗粒光栅进行建模。通过将数值结果与具有椭圆形横截面的金纳米圆柱体二维光栅的测量结果进行比较，展示了该方法的准确性。然后进行参数分析，以设计出具有偏振相关特性且在可见光范围内具有高透明度的高效滤波器。还使用麦克斯韦-加尼特均匀化理论对纳米颗粒光栅的行为进行建模，并通过与单个纳米颗粒的衍射进行比较来分析。所提出的结构旨在纳入可能具有创新应用的光学系统中。
