Generalized Brewster effect in dielectric metasurfaces.
Generalized Brewster effect in dielectric metasurfaces.
复制标题
DOI：
10.1038/ncomms10362
复制
发表时间：
2016-01-19
影响因子：
16.6
通讯作者：
Kuznetsov AI
中科院分区：
文献类型：
--
作者：
Paniagua-Domínguez R;Yu YF;Miroshnichenko AE;Krivitsky LA;Fu YH;Valuckas V;Gonzaga L;Toh YT;Kay AY;Luk'yanchuk B;Kuznetsov AI
偏振是定义光状态的关键属性。这是布鲁斯特在研究从不同角度从材料反射的光时发现的。这导致了基于布鲁斯特效应的第一个偏振器的出现。现在，光子学的一个趋势是研究与大块光学元件相比具有类似或改进功能的小型化器件。在这项工作中，从理论上预测，在任意角度、波长和偏振条件下，经过适当设计的全介质准表面可能呈现出广义的布鲁斯特效应。这种效应在可见光波长的硅纳米盘阵列上得到了实验验证。其物理基础与纳米粒子中激发的电偶极子共振和磁偶极子共振之间的干涉导致在一定角度上的散射被抑制有关。这些发现为布鲁斯特现象在光子学中的新应用打开了大门，光子学不受特定的偏振或入射角度的约束。纳米光子学需要具有更大自由度的器件。本文从理论和实验上证明，由于电偶极子和磁偶极子的干涉，在任何角度、波长和极化的全介质准表面中都可以观察到广义布鲁斯特效应。
Polarization is a key property defining the state of light. It was discovered by Brewster, while studying light reflected from materials at different angles. This led to the first polarizers, based on Brewster's effect. Now, one of the trends in photonics is the study of miniaturized devices exhibiting similar, or improved, functionalities compared with bulk optical elements. In this work, it is theoretically predicted that a properly designed all-dielectric metasurface exhibits a generalized Brewster's effect potentially for any angle, wavelength and polarization of choice. The effect is experimentally demonstrated for an array of silicon nanodisks at visible wavelengths. The underlying physics is related to the suppressed scattering at certain angles due to the interference between the electric and magnetic dipole resonances excited in the nanoparticles. These findings open doors for Brewster phenomenon to new applications in photonics, which are not bonded to a specific polarization or angle of incidence. Devices with greater freedom are desired in nanophotonics. Here, the authors demonstrate theoretically and experimentally that the generalized Brewster effect can be observed in an all-dielectric metasurface potentially for any angle, wavelength and polarization, due to electric and magnetic dipole interference.