Next Article in Journal
Modular Bayesian Networks with Low-Power Wearable Sensors for Recognizing Eating Activities
Previous Article in Journal
A Hybrid Feature Model and Deep-Learning-Based Bearing Fault Diagnosis
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Sensors 2017, 17(12), 2879; https://doi.org/10.3390/s17122879

Refractive Index Sensor Based on a Metal–Insulator–Metal Waveguide Coupled with a Symmetric Structure

1
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China
2
School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi 214122, China
3
Aerospace Science and Technology Corporation, Beijing Institute of Space Long March Vehicle, Beijing 100036, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 16 November 2017 / Revised: 4 December 2017 / Accepted: 6 December 2017 / Published: 11 December 2017
(This article belongs to the Section Physical Sensors)
Full-Text   |   PDF [3911 KB, uploaded 12 December 2017]   |  

Abstract

In this study, a new refractive index sensor based on a metal–insulator–metal waveguide coupled with a notched ring resonator and stub is designed. The finite element method is used to study the propagation characteristics of the sensor. According to the calculation results, the transmission spectrum exhibits a typical Fano resonance shape. The phenomenon of Fano resonance is caused by the coupling between the broadband spectrum and narrowband spectrum. In the design, the broadband spectrum signal is generated by the stub, while the narrowband spectrum signal is generated by the notched ring resonator. In addition, the structural parameters of the resonators and the structure filled with media of different refractive indices are varied to study the sensing properties. The maximum achieved sensitivity of the sensor reached 1071.4 nm/RIU. The results reveal potential applications of the coupled system in the field of sensors. View Full-Text
Keywords: surface plasmon polaritons; Fano resonance; finite element method; refractive index sensor surface plasmon polaritons; Fano resonance; finite element method; refractive index sensor
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Yan, S.; Zhang, M.; Zhao, X.; Zhang, Y.; Wang, J.; Jin, W. Refractive Index Sensor Based on a Metal–Insulator–Metal Waveguide Coupled with a Symmetric Structure. Sensors 2017, 17, 2879.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top