مشخصات پژوهش

A new surface plasmon resonance (SPR) sensing method based on Fresnel diffraction (FD) is proposed and investigated by theory and experiment. The impact of the SPR on the intensity and phase response of the proposed structure is evaluated using a modified Kretschmann configuration. Compared to the conventional optical-phase-detection-based Kretschmann configuration, in the proposed approach, it is only necessary to measure the visibility of the diffraction fringes. The phase responses of the sensor, making it more attractive for practical high-sensing applications.