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A Refractive Index Sensor Based on a Metal-Insulator-Metal Waveguide-Coupled Ring Resonator
Shu-Bin Yan1,2, Liang Luo3,4, Chen-Yang Xue5,6
1Science and Technology on Electronic Test &Measurement Laboratory, North University of China, No.3 Xueyuan Road, Taiyuan 030051, China. shubin_yan@nuc.edu.cn.
Sensors (Basel, Switzerland)
|November 28, 2015
Summary
This study presents a novel refractive index sensor using metal-insulator-metal waveguides and a ring resonator. The sensor demonstrates filter-like behavior and high sensitivity for refractive index sensing applications.
Area of Science:
- Photonics and optical sensing
- Plasmonics
- Nanophotonics
Background:
- Refractive index sensors are crucial for various applications, including chemical and biological detection.
- Metal-insulator-metal (MIM) waveguide structures offer unique plasmonic properties for miniaturized optical devices.
Purpose of the Study:
- To design and simulate a novel refractive index sensor based on MIM waveguides and a ring resonator.
- To investigate the sensing performance and filter properties of the proposed sensor structure.
- To analyze the impact of structural parameters on the sensor's performance.
Main Methods:
- Finite-difference time-domain (FDTD) method for simulating transmission spectrum and magnetic field distribution.
- Analysis of asymmetric line shape in the transmission spectrum.
- Characterization of sensing performance using quality factor and sensitivity.
Main Results:
- The proposed sensor exhibits an asymmetric line shape in its transmission spectrum.
- The sensor demonstrates filter-like behavior, indicating potential for wavelength-selective applications.
- The study explores the relationship between structural parameters and the sensor's sensing performance and filter properties.
Conclusions:
- The developed MIM waveguide and ring resonator sensor shows promise for high-sensitivity refractive index sensing.
- The filter-like characteristics of the transmission spectrum open possibilities for integrated optical filtering.
- Further optimization of structural parameters can enhance the sensor's overall performance.
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