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Surface plasmon resonance (SPR) is the excitation of cumulative charge oscillations in the metal-dielectric interface. Because the surface plasmon is highly sensitive to environmental refractive index changes, SPR sensors are designed and manufactured for research, laboratory and industrial applications. These sensors can generally track changes in the plasmon by measuring parameters such as intensity, phase, angle and wavelength of light. Among these methods the phase measurement method is the most sensitive. This paper proposes the idea of increasing the sensitivity of the SPR phase sensor based on the polarization control of the light and confirms its theoretical and experimental performance.
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