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Updated: Jun 28, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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Published on: August 30, 2012

Four-Stub Resonator-Coupled MIM Waveguide Sensor.

Jifan Yang^1,2,3, Shubin Yan^2,3, Zhenyang Xu⁴

¹School of Electrical and Control Engineering, North University of China, Taiyuan 030051, China.

Sensors (Basel, Switzerland)

|March 28, 2026

Summary

This summary is machine-generated.

A novel metal-insulator-metal waveguide sensor with a circular four-stub resonator was developed. This new sensor shows high sensitivity for refractive index sensing and potential for accurate temperature measurements.

Keywords:

fano resonance nanosensor surface plasmon polaritons temperature measurement

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Area of Science:

Photonics and optical sensing
Nanophotonics
Integrated optics

Background:

Metal-insulator-metal (MIM) waveguides are crucial components in integrated optics.
Resonators enhance light-matter interactions for sensing applications.
Developing novel sensor structures is key for advancements in metrology.

Purpose of the Study:

To propose and analyze a new sensor structure based on MIM waveguide and circular four-stub resonator (CFSR).
To investigate the influence of various parameters and structural modifications on sensor performance.
To optimize the sensor design for enhanced sensitivity and figure of merit.

Main Methods:

Utilized the finite element method (FEM) for comprehensive performance analysis.
Systematically examined the impact of different design parameters and structural variations.
Performed optimization to identify the best configuration for the proposed sensor.

Main Results:

Achieved a high sensitivity (S) of 2940 nm/RIU for refractive index sensing.
Obtained a significant figure of merit (FOM) of 52.5.
Demonstrated a core parameter of 1.508 nm/°C, indicating suitability for temperature sensing.

Conclusions:

The proposed MIM waveguide and CFSR sensor structure offers excellent performance for refractive index sensing.
The sensor design exhibits considerable potential for precise temperature measurement applications.
This work contributes a novel and efficient optical sensor for diverse metrological tasks.