Wu Shan, Xu Su, Zhang Yi, Wu Yanning, Jiang Jianjuan, Wang Qianjin, Zhang Xuejin, Zhu Yongyuan
Opt Lett. 2014 Nov 15;39(22):6426-9. doi: 10.1364/OL.39.006426.
Three-dimensional (3D) asymmetric plasmonic structures possessing asymmetric optical transmission properties have been widely studied. However, these structures have limitations for application due to fabrication techniques. Here, a quasi-3D asymmetric structure built up by a metallic rod-shaped particles layer and a metallic L-shaped holes layer was fabricated by the sputtering and the focused ion beam (FIB) milling. A broadband (1000-1600 nm) asymmetric transmission and optical rotation have been demonstrated experimentally. Numerical calculations show that the coupling between the cavity and particle plasmonic resonances contributes to this effect.
具有非对称光学传输特性的三维（3D）非对称等离子体结构已得到广泛研究。然而，由于制造技术的原因，这些结构在应用方面存在局限性。在此，通过溅射和聚焦离子束（FIB）铣削制造了一种由金属棒状颗粒层和金属L形孔层构成的准3D非对称结构。实验证明了其具有宽带（1000 - 1600纳米）非对称传输和旋光性。数值计算表明，腔与粒子等离子体共振之间的耦合促成了这种效应。
