Manipulation of Multiple Fano Resonances Based on a Novel Chip-Scale MDM Structure

IEEE Access

Yuwen Qin¹  Dongyue Zhou²  Liang Lei²  Yihong Fang²  Li Chen²  Jinyun Zhou²  Zhengfeng Li²  Kunhua Wen² 

[1] Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangdong University of Technology, Guangzhou, China;School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, China;

关键词: Fano resonance;    metal-dielectric-metal waveguide;    plasmonic;    refractive index sensing;    slow light;   

DOI  :  10.1109/ACCESS.2020.2973417

来源: DOAJ

【 摘 要 】

A novel chip-scale metal-dielectric-metal (MDM) refractive-index sensor is proposed and investigated in this paper by using finite-difference time-domain (FDTD) method and multimode interference coupled-mode theory (MICMT), respectively. A slot cavity with an embedded tooth-shape cavity and a side-coupled semi-ring cavity are inserted between the input and output MDM waveguides. According to the simulation results, dual ultra-sharp and asymmetrical Fano peaks emerge in transmission spectrum with high performances. Besides, the transmission responses for the primary parameters of this structure are also investigated. To focus on developing integrated photonic devices, the original structure is successfully expanded by two additional semi-ring cavities through an innovative coupling approach, generating up to eight Fano peaks with outstanding characteristics. It is believed that this novel MDM structure will be a guideline for designing the chip-scale plasmonic devices.

【 授权许可】

Unknown