Surface plasmon resonance sensor based on D-shaped microstructured optical fiber with hollow core

Area of Science:

• Photonics and Optical Sensing
• Nanotechnology and Plasmonics
• Fiber Optics

Background:

• Microstructured optical fiber (MOF)-based surface plasmon resonance (SPR) sensors face challenges in phase matching and analyte delivery.
• Traditional SPR sensors often require complex filling of microfluidic channels.

Purpose of the Study:

• To propose and investigate a novel D-shaped hollow-core MOF-based SPR sensor.
• To address phase matching and analyte filling issues in MOF-SPR sensors.
• To evaluate the feasibility of this sensor for high-sensitivity, real-time, and distributed sensing.

Main Methods:

• Numerical investigation of SPR sensing performance using a D-shaped hollow-core MOF.
• Analysis of the effect of air holes in the fiber core on refractive index matching.
• Assessment of sensor sensitivity based on wavelength, amplitude, and phase shifts.

Main Results:

• The air hole in the D-shaped hollow-core MOF effectively lowers the core mode's refractive index for phase matching.
• Analyte deposition is simplified by direct application to the D-shaped flat surface.
• The sensor's sensitivity to wavelength, amplitude, and phase shifts was numerically identified.

Conclusions:

• The D-shaped hollow-core MOF-SPR sensor offers a viable solution to phase matching and analyte filling problems.
• This design demonstrates potential for developing high-sensitivity, real-time, and distributed SPR sensing systems.
• Further development could lead to advanced optical sensing platforms.