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非对称MIM波导结构中的可调谐法诺共振

Tunable Fano Resonance in Asymmetric MIM Waveguide Structure.

作者信息

Zhao Xuefeng, Zhang Zhidong, Yan Shubin

机构信息

Science and Technology on Electronic Test and Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China.

出版信息

Sensors (Basel). 2017 Jun 25;17(7):1494. doi: 10.3390/s17071494.

DOI:10.3390/s17071494
PMID:28672828
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5539689/
Abstract

A plasmonic waveguide coupled system that uses a metal-insulator-metal (MIM) waveguide with two silver baffles and a coupled ring cavity is proposed in this study. The transmission properties of the plasmonic system were investigated using the finite element method. The simulation results show a Fano profile in the transmission spectrum, which was caused by the interaction of the broadband resonance of the Fabry-Perot (F-P) cavity and the narrow band resonance of the ring cavity. The Fabry-Perot (F-P) cavity in this case was formed by two silver baffles dividing the MIM waveguide. The maximum sensitivity of 718 nm/RIU and the maximum figure of merit of 4354 were achieved. Furthermore, the effects of the structural parameters of the F-P cavity and the ring cavity on the transmission properties of the plasmonic system were analyzed. The results can provide a guide for designing highly sensitive on-chip sensors based on surface plasmon polaritons.

摘要

本研究提出了一种等离子体波导耦合系统，该系统使用带有两个银挡板的金属-绝缘体-金属（MIM）波导和一个耦合环形腔。采用有限元方法研究了该等离子体系统的传输特性。仿真结果表明，传输谱中呈现出法诺轮廓，这是由法布里-珀罗（F-P）腔的宽带共振与环形腔的窄带共振相互作用引起的。在这种情况下，法布里-珀罗（F-P）腔由两个分隔MIM波导的银挡板形成。实现了718 nm/RIU的最大灵敏度和4354的最大品质因数。此外，分析了F-P腔和环形腔的结构参数对等离子体系统传输特性的影响。研究结果可为基于表面等离激元极化激元的高灵敏度片上传感器设计提供指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/3572ea287297/sensors-17-01494-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/fa0b9a01b9ab/sensors-17-01494-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/800222054b8f/sensors-17-01494-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/0c0c919bec0c/sensors-17-01494-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/f230ec7e8af6/sensors-17-01494-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/bf6cedd81951/sensors-17-01494-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/235fb2965995/sensors-17-01494-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/3572ea287297/sensors-17-01494-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/fa0b9a01b9ab/sensors-17-01494-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/800222054b8f/sensors-17-01494-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/0c0c919bec0c/sensors-17-01494-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/f230ec7e8af6/sensors-17-01494-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/bf6cedd81951/sensors-17-01494-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/235fb2965995/sensors-17-01494-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dddd/5539689/3572ea287297/sensors-17-01494-g007.jpg

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