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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
Published on: January 7, 2019
Surface-plasmon-resonance sensor based on three-hole microstructured optical fiber
Markus Hautakorpi1, Maija Mattinen, Hanne Ludvigsen
1Fiber Optics Group, Department of Micro and Nanosciences, Helsinki University of Technology, P.O.Box 3500, FI-02015 TKK, Finland. markus.hautakorpi@tkk.fi
Optics Express
|June 12, 2008
Summary
A new surface-plasmon-resonance sensor uses a coated optical fiber for sensitive detection. This design achieves a high refractive-index resolution of 1x10(-4) for aqueous analytes.
Area of Science:
- Photonics and Sensing Technologies
- Materials Science for Optical Devices
Background:
- Microstructured optical fibers offer unique light-confining properties.
- Surface Plasmon Resonance (SPR) sensors are crucial for high-sensitivity detection.
Purpose of the Study:
- To propose a novel SPR sensor design utilizing a three-hole microstructured optical fiber.
- To enhance sensor fabrication and analyte infiltration capabilities.
- To achieve high refractive-index resolution for aqueous analytes.
Main Methods:
- Coating the holes of a three-hole microstructured optical fiber with a low-index dielectric layer.
- Depositing a gold layer on top of the dielectric layer.
- Numerical simulations to analyze optical loss and refractive-index resolution.
Main Results:
- Achieved very small optical loss for the Gaussian guided mode by tuning the dielectric layer thickness.
- Demonstrated a refractive-index resolution of 1x10(-4) for aqueous analytes.
- The design facilitates fabrication and analyte infiltration due to fiber hole size and number.
Conclusions:
- The proposed SPR sensor design based on a coated three-hole microstructured optical fiber is effective.
- The sensor exhibits excellent performance metrics, including high resolution and low optical loss.
- This design presents a promising platform for advanced sensing applications.
