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Updated: Aug 25, 2025
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Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
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MIM waveguide system with independently tunable double resonances and its application for two-parameter detection.
Applied Optics
|October 18, 2022
Summary
This study proposes a novel metal-insulator-metal (MIM) waveguide system for sensing applications. The system demonstrates high sensitivity for refractive index sensing and enables simultaneous measurement of glucose and blood plasma concentrations.
Area of Science:
- Photonics and Nanotechnology
- Sensing Technologies
- Biomedical Engineering
Background:
- Metal-insulator-metal (MIM) waveguides offer unique plasmonic properties.
- Refractive index sensors are crucial for various applications, including biomedical diagnostics.
- Simultaneous measurement of multiple analytes is a significant challenge in sensing.
Purpose of the Study:
- To propose and analyze a novel MIM waveguide system with coupled ring and semi-ring cavities.
- To investigate the sensing performance of the proposed system for refractive index variations.
- To demonstrate the capability of simultaneous measurement of glucose and blood plasma concentrations.
Main Methods:
- Utilized the finite element method (FEM) to analyze transmission characteristics.
- Investigated the impact of geometric parameters on system performance.
- Analyzed sensing performance by detecting resonance wavelength shifts with refractive index changes.
Main Results:
- Achieved a maximum refractive index sensitivity of 2412 nm/RIU.
- Demonstrated independent tuning of double resonances by isolating ring and semi-ring cavities.
- Obtained sensitivities of 0.13133 nm/(g/L) for glucose and 0.358 nm/(g/L) for blood plasma concentration.
Conclusions:
- The proposed MIM waveguide system functions as an efficient refractive index sensor.
- The dual-cavity design enables simultaneous and independent sensing of two different analytes.
- This system holds potential for advanced nano-sensing applications, particularly in simultaneous biochemical concentration monitoring.
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