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A Surface Plasmon Resonance-Based Photonic Crystal Fiber Sensor for Simultaneously Measuring the Refractive Index and
Jingao Zhang1, Jinhui Yuan1,2, Yuwei Qu1
1The State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Polymers
|September 23, 2022
Summary
This study introduces a novel surface plasmon resonance (SPR)-based photonic crystal fiber (PCF) sensor for simultaneous refractive index (RI) and temperature measurement. The sensor design enables independent and accurate detection for applications in biomedicine and environmental science.
Area of Science:
- Photonics
- Optical Sensing
- Materials Science
Background:
- Simultaneous measurement of refractive index (RI) and temperature is crucial for various scientific applications.
- Existing sensors often face limitations in simultaneous and independent detection capabilities.
- Photonic Crystal Fibers (PCFs) offer unique light-confining properties for advanced sensor development.
Purpose of the Study:
- To propose and design a novel SPR-based PCF sensor for simultaneous RI and temperature measurement.
- To achieve independent detection of RI and temperature by utilizing distinct wavelength regions.
- To demonstrate the potential of the sensor for practical applications in biomedicine and environmental science.
Main Methods:
- Design of a PCF structure with gold film coatings on the central air hole and external surface.
- Incorporation of a temperature-sensitive material (TSM) within an air hole of the PCF.
- Utilizing surface plasmon resonance (SPR) principles for sensing.
- Simulating sensor performance for RI and temperature detection.
Main Results:
- The proposed SPR-based PCF sensor achieves average wavelength sensitivities of 4520 nm/RIU for RI and 4.83 nm/°C for temperature.
- Simulations cover RI range of 1.35-1.40 and temperature range of 20-60 °C.
- Independent RI and temperature sensing is demonstrated by operating in different wavelength regions.
Conclusions:
- The developed SPR-based PCF sensor effectively enables simultaneous and independent measurement of RI and temperature.
- The sensor exhibits high sensitivity, making it suitable for precise measurements.
- This technology holds significant promise for advancements in biomedical and environmental monitoring.
