金谐振环对的光学性质研究

Research on the Optical Properties of Au Split Ring Pairs

运用时域有限差分方法,研究内置金纳米双棒的谐振环对的光学性质。研究发现:谐振环对的光学透射谱受纳米棒间距、开口缝宽度及填充介质的介电常数影响。基于瞬时电场分量Ex、Ey分布情况,揭示了共振峰源于0-相共振模式,共振谷源于π-相共振模式。

A research has been carried out on the optical properties of double gold nanobars embedded in split ring pairs by adopting the finite difference time domain method.The study shows that the optical transmission spectra of the resonant ring pairs are influenced by the distance between the nanorods,the width of the opening slot and the dielectric constant of the filling medium.Based on the distribution analysis of the electric fields Ex and Ey,it is revealed that the resonance peak originates from 0-phase resonance mode,and the resonance dip originates fromπ-phase resonance mode.