光通信研究, 2018 (2): 55, 网络出版: 2018-07-30  

含矩形腔MIM波导耦合谐振效应的数值研究

Numerical Study of Coupling Effect on Metal-Insulator-Metal Waveguide with Rectangular Resonators
作者单位
南京邮电大学 光电工程学院,南京 210046
摘要
金属-电介质-金属(MIM)等离子波导系统可以在纳米尺寸上实现光的控制,突破衍射极限,因而受到了越来越多的关注。采用时域有限差分(FDTD)法分析了一种新型MIM波导系统的耦合谐振特性。仿真结果显示,单腔耦合中,波导系统谐振波长随着谐振腔高度、耦合距离的增大而蓝移,随谐振腔宽度的增大而红移;双腔耦合中,类电磁诱导透射峰值随谐振腔间距离增大而降低,该结构透射率最大值可达0.62。类电磁诱导效应可改变光的群速度,理论计算该结构的最大光延迟可达0.14 ps。研究结果表明,含矩形腔MIM波导系统可在纳米尺寸上控制光的传播,为等离子纳米器件集成提供了理论参考。
Abstract
Metal-Insulator-Metal (MIM) plasma waveguide systems can manipulate light at the nanoscale domain and overcome the diffraction limit, which has attracted much attention recently. In this paper, a Finite Different Time Domain (FDTD) method is used to analyze the coupling resonant characteristics of a novel MIM waveguide system. The simulation results show that the resonant wavelength of the waveguide system is smaller with larger the resonant cavity height and coupling distance in the single cavity coupling. The resonant wavelength is larger with larger resonant cavity width. In the double-cavity coupling, the peak value of the electromagnetic induced transmission decreases with the increase of distance between the cavities, and the maximum transmittance of the structure is 0.62. The electromagnetic induction effect can change the group velocity of light. The maximum optical delay of the structure is 0.14 ps. The results show that the rectangular cavity MIM waveguide system controls the propagation of light in nanoscale domain, which provides a theoretical reference for the integration of plasma nanometer devices.

刘鹏华, 关建飞. 含矩形腔MIM波导耦合谐振效应的数值研究[J]. 光通信研究, 2018, 44(2): 55. LIU Peng-hua, GUAN Jian-fei. Numerical Study of Coupling Effect on Metal-Insulator-Metal Waveguide with Rectangular Resonators[J]. Study On Optical Communications, 2018, 44(2): 55.

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