含正交矩形腔MIM波导电磁感应透明及慢光效应的数值研究

Numerical Study on The Coupling Resonance Effect of Orthogonal Rectangular Cavity in MIM Waveguide

摘要:

通过在金属-电介质-金属(MIM)波导单侧引入正交的双谐振腔结构,得到了实现等离激元诱导透明效应的结构模型。采用有限元法计算得到了该结构的透射谱曲线。仿真结果显示,波导系统的谐振波长随着正交双谐振腔有效谐振长度(L_eff)的增加而红移,且当正交矩形腔为对称的T形结构时,会出现传输禁带。在此基础上讨论了当正交矩形腔为非对称结构时,在传输禁带处产生类电磁诱导透明峰的物理条件,以及该透射峰的变换规律。类电磁诱导效应可改变光的群速度,从而产生慢光效应。研究结果表明,含正交矩形腔MIM的波导结构可以得到0.086ps的最大光时延,为光路延时以及光数据存储提供了理论参考。

Abstract:

By introducing an orthogonal double resonant cavity structure on one side of a MIM waveguide, a structural model for achieving plasmon-induced transparency effects was obtained. The transmission spectrum curve of the structure was calculated by the finite element method. Simulation results show that the resonant wavelength of the waveguide system is red-shifted with the increase of the effective resonant length (L_eff) of the orthogonal double resonator, and when the orthogonal rectangular cavity is a symmetrical T-shaped structure, the transmission forbidden band will appear. Based on this, the physical conditions for generating an electromagnetic-induced transparent peak at the transmission band gap and the transformation law of the transmission peak are discussed when the orthogonal rectangular cavity is an asymmetrical structure. The electromagnetic induction effect can change the group velocity of light, resulting in a slow light effect. The research results show that the MIM waveguide structure with orthogonal rectangular cavity can obtain the maximum optical delay of 0.086ps.