一种半环形表面等离子体光波导滤波器的传输特性研究

本文设计并提出一种基于金属-介质-金属结构的带有半环形共振腔的表面等离子体光波导滤波器,利用数值模拟的方法研究了其传输特性。结果表明,在该结构传输谱曲线中形成的滤波阻带位置可以通过改变半环形共振腔的半径来调整。另外由于结构固有的特性,在传输谱曲线上还可以观察到类似等离子体感应透明的传输特性,而且这一特性可以通过改变半环形共振腔与直波导之间的耦合间距和采用面对面放置的双半环结构进行调节。本文所设计的结构可以动态控制光的传输,并可以应用于紧凑型纳米光学器件集成领域。

Abstract

In this paper,a metal-insulator-metal type surface plasmon waveguide based filter composed of a straight waveguide side-coupled with a semi-ring resonator is theoretically presented first. The transmission properties are studied via the numerical method. The simulation results show that the stop-band of the transmission spectra can be easily tuned by changing the radius of the semi-ring. Because of the structure’s intrinsic characteristics,a plasmon induced transparent (PIT) type properties can be observed in the transmission spectra and the properties can be tuned by changing the couple distance,the radius of the semi-ring and by adding another face to face semi-ring. The presented results pave the way toward the dynamic control of light propagation in MIM semi-ring structures and integrating of compact nanophotonic devices.

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刘霞, 田晋平, 杨荣草. 一种半环形表面等离子体光波导滤波器的传输特性研究[J]. 量子光学学报, 2017, 23(2): 168. LIU Xia, TIAN Jin-ping, YANG Rong-cao. Study of the Characteristics of a Semi-ring Surface Plasmonic Waveguide Filter[J]. Acta Sinica Quantum Optica, 2017, 23(2): 168.

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