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The sensing characteristics of plasmonic waveguide with a ring resonator
Optics Express
|April 11, 2014
Summary
This study presents a novel refractive index sensor using surface plasmon polaritons (SPPs) in a metal-insulator-metal (MIM) waveguide. The sensor achieves high sensitivity for refractive index and temperature sensing applications.
Area of Science:
- Photonics and Nanotechnology
- Optical Sensing
- Plasmonics
Background:
- Metal-insulator-metal (MIM) waveguides are crucial for plasmonic devices.
- Ring resonators enable precise control of light-matter interactions.
- Refractive index sensors are vital for various scientific and industrial applications.
Purpose of the Study:
- To propose and analyze a novel MIM waveguide-based refractive index sensor.
- To investigate the sensing capabilities for refractive index and temperature.
- To optimize the structure for enhanced sensitivity.
Main Methods:
- Numerical simulation using the finite element method (FEM).
- Analysis of transmission spectra to determine sensing characteristics.
- Systematic investigation of structural parameter effects.
Main Results:
- The proposed sensor exhibits three distinct resonance peaks in its transmission spectrum.
- A linear relationship was observed between resonance peaks and the surrounding refractive index.
- Achieved a high theoretical refractive index sensitivity of 3460 nm/RIU.
- Demonstrated a temperature sensitivity of 1.36 nm/°C.
Conclusions:
- The developed sensor offers high sensitivity for refractive index and temperature detection.
- The structure is suitable for nanometer-scale sensing applications.
- This work contributes to the advancement of optical sensing technologies.
