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An improved refractive index sensor based on genetic optimization of plasmon waveguide resonance
Optics Express
|October 10, 2013
Summary
Plasmon waveguide resonance (PWR) sensors offer superior refractive index resolution for biosensing compared to surface plasmon resonance (SPR) sensors. PWR sensors achieved a resolution 6 times better than SPR, enhancing measurement reliability.
Area of Science:
- Photonics and Biosensing
- Optical Sensor Technology
Background:
- Surface plasmon resonance (SPR) sensors are widely used in biosensing.
- Plasmon waveguide resonance (PWR) sensors offer unique polarization sensing capabilities.
Purpose of the Study:
- To comprehensively compare the performance of PWR and SPR sensors.
- To evaluate sensitivity and refractive index resolution for biosensing applications.
Main Methods:
- Optimization of both PWR and SPR sensors using a genetic algorithm.
- Experimental performance evaluation for bulk sensing.
Main Results:
- PWR sensor demonstrated a refractive index resolution of 5 × 10(-7) RIU.
- PWR sensor's resolution was 6 times better than the optimized SPR sensor.
- TE polarization in PWR sensor showed a resolution of 1.4 × 10(-6) RIU, outperforming SPR.
Conclusions:
- PWR sensors provide enhanced refractive index resolution compared to SPR sensors.
- The polarization diversity of PWR sensors improves measurement reliability in biosensing.
