为实现天然材料所不具备的性能和在隐身、吸波等方面的应用，光学超材料近年来成为研究热点。申请人曾成功实现了通过电信号调控超材料的共振效应，并于近期发现该方法可应用于纳米多孔金。多孔金具有类似超材料的共振效应且可电信号调控，但其变化规律和机理尚不清楚。由于传统超材料和多孔金都具有吸波效应，如将二者结合，即基于多孔金微结构的新型超材料将会具有更优异的性能。本项目拟通过光度计电化学原位测量和利用电磁场理论、数值模拟等实验和理论研究，探索多孔金随孔径尺寸变化其共振（增强）的变化规律，并研究其在荷电下对共振频率和振幅的调控机理；通过设计微结构阵列的超材料中基础材料的孔径尺寸、和阵列拓扑结构，实现对其光学性能的设计，及在电信号下对共振响应的调控。本研究对揭示多孔金表面电荷密度对电磁波吸收的影响、超材料拓扑结构与图形多孔金的共振的互相耦合对光学性能的复合作用机理、新型超材料功能化设计都将具有重要意义。

Photonic metamaterials are receiving great attention for the purpose of obtaining unique properties and applications, such as invisibility, wave absorbing, which do not exist in natural materials. The applicant has developed a novel electrically controlled metamaterial with tunable optical resonance, and recently they found out that this approach can be applied to nanoporous gold. Nanoporous gold has a similar optical resonance effect which can be controlled by applying external electric signal. However, the trend and underlying mechanism have not been studied yet. Due to both the traditional photonic metamaterials and nanoporous gold have wave absorbing effect, a stronger wave absorbing property can be expected if one can combine them - which means a novel metamaterial based on resonators consisting of nanoporous gold. This study is aiming at exploring the resonance enhancing dependence on ligament size variation, and the mechanism of controlling resonant frequencies and oscillation amplitude under charging condition through the following methods: in-situ electrochemical optical measurement, electromagnetic theory, numerous simulation and so on. By designing the pore size and topology of resonator arrays in metamaterials, the goal of controlling their optical property by electric signal can be achieved. This project is expected to have the following three achievements: 1) understanding the effect of surface charge density of nanoporous gold on its electromagnetic absorption properties; 2) characterizing the novel optical properties and tunability of metamaterials based on nanoporous gold; 3) designing novel functional photonic metamaterials.