金属微结构的Fano共振透射强度和光学活性的实验研究和理论模拟

项目名称： 金属微结构的Fano共振透射强度和光学活性的实验研究和理论模拟

项目编号： No.11304002

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 黄万霞

作者单位： 安徽师范大学

项目金额： 28万元

中文摘要： 本项目将通过研究对称破缺对金属微结构光学性能的影响，探讨决定Fano共振透射强度和光学活性及其调制效应的物理机制。首先，实验研究单元结构中两个结构距离的变化（即结构的对称破缺）以及背景材料的折射率变化（即材料折射率的对称破缺）对Fano共振透射谱的影响，探索其物理机制和实现完美透射的条件；其次，利用数值模拟，研究多层手性对称破缺结构间的间距和相位差对金属微结构的旋光和圆二向色性以及圆双折射方面的影响，揭示手性对称破缺将增强光学旋转和圆二向色性。本项目研究成果将对于加深理解Fano共振透射和光学活性具有重要意义，为研制高性能的光电器件、滤波器以及生物传感器件提供依据。

中文关键词： 表面等离激元；光学旋转；Fano共振；圆二向色性；对称破缺

英文摘要： In this project, the physical mechanism underlying the transmission strength of the Fano resonance and optical activity will be investigated by studying the influence of symmetry breaking on optical properties of metal microstructures. First, the influence on the transmission strength of the Fano resonance will be investigated experimentally by varing the distance between the two structure of the unit cell, namely, the structural symmetry breaking, and by varying the refractive index of the background material, that is, the material symmetry breaking. The underlying physical mechanism and the condition of nearly perfect Fano transmission will be revealed. Second, the influence on the optical rotation, circular dichroism and circular birefringence of metal microstructures due to space and phase difference between multilayer structures with the chiral symmetry breaking will be studied by numerical simulations. This investigation might reveal the optical rotation and circular dichroism will be enlarged due to the chiral symmetry breaking. Results of the present investigations will further our understanding of the transmission strength of the Fano resonance and optical activity,and provide clues for the fabrication of the high-performance optoelectronic device, the high-sensitive biosensor and the filter.

英文关键词： Surface plasmon polariton；Optical rotation；Fano resonance；Circular dichroism；Symmetry breaking