Multiple fano resonances in an end-coupled MIM waveguide system

被引：32

作者：

Fang, Yihong ^{[1
]}

Wen, Kunhua ^{[1
]}

Qin, Yuwen ^{[2
]}

Li, Zhengfeng ^{[1
]}

Wu, Bingye ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou 510006, Guangdong, Peoples R China

[2] Guangdong Univ Technol, Sch Informat Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2019年 / 452卷

基金：

中国国家自然科学基金;

关键词：

Fano resonances; On-chip sensing technology; Finite-difference time-domain (FDTD) method; Multiple interference coupled mode theory (MICMT) method; PLASMONICALLY INDUCED TRANSPARENCY; SLOW LIGHT; RESONATORS;

D O I：

10.1016/j.optcom.2019.06.076

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, multiple tunable Fano resonances are firstly achieved in an end-coupled system composed of a rectangular cavity and an inverted U-shaped groove. Through increasing a coupling path, dual Fano resonances are tuned to four Fano peaks. High figure of merits (FOMs) and high refractive index sensitivities are obtained so that the proposed structure is preferred in the highly integrated optical sensing technology. Besides, a new Fano resonance with high performances occurs through cascading a horizontal rectangular cavity. Additionally, the phase shifts and the group delays are also investigated within the Fano resonant windows. These proposed structures are investigated and analyzed by 2D finite-difference time-domain (FDTD) method and multiple interference coupled mode theory (MICMT) method, respectively, and the results show enormous potential in highly integrated optical area.

引用

页码：12 / 17

页数：6

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