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Polarization-Multiplexed Incoherent Broadband Surface Plasmon Resonance: A New Analytical Strategy for Plasmonic
Jayeta Banerjee1, Sudip Mandal1, Manik Pradhan1
1Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Salt Lake, JD Block, Sector III, Kolkata 700106, India.
Analytical Chemistry
|April 27, 2022
Summary
A new polarization-multiplexed incoherent broadband-surface plasmon resonance (PMIBB-SPR) probe enhances plasmonic sensing. This advanced technique offers high sensitivity for detecting molecules at interfaces, paving the way for next-generation analytical tools.
Area of Science:
- Optics and Photonics
- Materials Science
- Analytical Chemistry
Background:
- Surface plasmon resonance (SPR) is a critical interfacial phenomenon utilized in plasmonic sensors.
- These sensors rely on exciting collective electron oscillations at metal-dielectric interfaces.
- Existing SPR techniques require advancements for enhanced sensitivity and real-time molecular interaction analysis.
Purpose of the Study:
- To develop and validate a novel incoherent broadband-surface plasmon resonance (IBB-SPR) probe.
- To integrate wavelength interrogation with polarization-multiplexing (PM) for improved sensing capabilities.
- To investigate the relationship between plasmonic polariton resonance (PPR) and polarization modulation.
Main Methods:
- Development of a polarization-multiplexing incoherent broadband-SPR (PMIBB-SPR) probe.
- Utilized wavelength interrogation and polarization-multiplexing techniques.
- Measured Stokes parameters of reflected light to explore PPR and polarization modulation.
Main Results:
- The PMIBB-SPR strategy demonstrated excellent wavelength sensitivity (0.1363 nm/mM) and phase sensitivity (10.34597 mM/deg).
- Validated performance for detecting nonenzymatic aqueous urea samples.
- Provided deeper understanding of polarization-multiplexed SPR fundamentals at interfaces.
Conclusions:
- The developed PMIBB-SPR probe offers a significant advancement in plasmonic sensing technology.
- The study deepens the fundamental understanding of polarization effects in SPR.
- This work lays the foundation for developing next-generation analytical techniques for real-time interfacial molecular interaction monitoring.
