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Updated: May 8, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Enhanced Surface Plasmon Resonance Sensing via Kramers-Kronig Phase Extraction
Meghan Naar1, Yazan Bdour1, Patrick Julien2
1Department of Physics and Space Science, Royal Military College of Canada, Kingston, Ontario, Canada K7K 7B4.
Abstract:
This study introduces a novel approach to enhance surface plasmon resonance (SPR) sensing using Kramers-Kronig (K-K) relations for phase extraction from reflection spectra. By applying the K-K relations, a phase shift sensitivity of 3400°/RIU is achieved improving SPR detection limits to 9 × 10-6 RIU, which is four times more sensitive than conventional methods for determining SPR peak shifts. This advancement enables more precise detection of refractive index changes in aqueous solutions, making it valuable for biosensing and environmental monitoring with spectrometers.
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