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Miniature resonator sensor based on a hybrid plasmonic nanoring
Optics Express
|December 28, 2019
Summary
A novel hybrid plasmonic nanoring resonator sensor demonstrates high sensitivity (339.8 nm/RIU) and a low detection limit (1.5 × 10⁻⁴ RIU) for refractive index sensing.
Area of Science:
- * Plasmonics and Nanophotonics
- * Optical Sensors
- * Nanotechnology
Background:
- * Plasmonic nanostructures are crucial for advanced optical sensing.
- * Miniaturized sensors are needed for compact and efficient detection systems.
- * Hybrid plasmonic waveguides offer unique optical properties.
Purpose of the Study:
- * To design and investigate a miniature resonator sensor utilizing a hybrid plasmonic nanoring.
- * To optimize sensor dimensions for enhanced performance.
- * To analyze the sensor's sensitivity, Q factor, and detection limit.
Main Methods:
- * Finite-difference time-domain (FDTD) simulations using Lumerical software.
- * Optimization of plasmonic layer thickness and central hole size.
- * Analysis of spectral displacements, Q factors, and sensitivity dependence on refractive index.
Main Results:
- * Achieved high sensitivity of 339.8 nm/RIU.
- * Demonstrated a maximum Q factor of approximately 60,000.
- * Determined a minimum detection limit of 1.5 × 10⁻⁴ RIU.
- * Investigated the impact of geometric variations on sensor performance.
Conclusions:
- * The proposed hybrid plasmonic nanoring sensor offers excellent performance for refractive index sensing.
- * The sensor design shows potential for highly sensitive, ultracompact sensing applications.
- * Further exploration of geometric effects can refine sensor capabilities.
