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Published on: April 4, 2017
Intensity based surface plasmon resonance sensor using a nanohole rectangular array.
A-P Blanchard-Dionne1, L Guyot, S Patskovsky
1Department Engineering Physics, Laser Processing and Plasmonics Laboratory, École Polytechnique de Montréal, CP 6079, succ Centre-Ville, Montréal, Québec H3C 3A7, Canada.
Optics Express
|September 22, 2011
Summary
High-resolution surface plasmon resonance (SPR) sensing using a nanohole array achieves 6.4 x 10(-6) RIU resolution. This balanced detection method enhances sensitivity and reduces noise for nanoplasmonic applications.
Area of Science:
- Nanophotonics
- Plasmonics
- Optical Sensing
Background:
- Surface Plasmon Resonance (SPR) is a label-free optical technique.
- Nanohole arrays in metal films offer unique plasmonic properties.
- Improving SPR sensor sensitivity and noise reduction is crucial for advanced applications.
Purpose of the Study:
- To demonstrate high-resolution measurements using an SPR sensor.
- To investigate the performance of a rectangular nanohole array in a metal film.
- To explore a balanced intensity detection method for enhanced SPR sensing.
Main Methods:
- Fabrication of a rectangular nanohole array in a metal film.
- Utilized a He-Ne laser beam with balanced intensity detection.
- Measured SPR response using orthogonal polarizations for noise reduction.
Main Results:
- Achieved a bulk sensitivity resolution of 6.4 x 10(-6) Refractive Index Units (RIU).
- Demonstrated improved sensitivity and noise reduction through balanced detection.
- Showcased the potential for high-resolution SPR measurements.
Conclusions:
- The proposed SPR sensor methodology offers high resolution.
- Balanced intensity detection significantly enhances sensor performance.
- The technology is promising for portable nanoplasmonic multisensing and imaging.
