Surface Plasmon Resonance Sensors: Optimization of Diffraction Grating and Prism CouplersW. Raja, A. Alabastri, S. Tuccio, R. Proietti Zaccaria
Department of Nanostructures, Istituto Italiano di Tecnologia, Genova, Italy
Surface plasmon resonance (SPR) sensors proved themselves as a promising device for many kinds of applications such as optical biosensing, binding constant determinationor nanofilm thickness measurements. Here we simulate using COMSOL Multiphysics® the light-polaritons coupling for the two most commonly used SPR setups: Attenuated total reflection (Kretschmann configuration) and diffraction gratings as shown in Figure 1. Furthermore, we illustrate a comprehensive designing rule to determine the parameters for optimizing the generation of surface plasmon polaritons (SPP) for the both setups i.e. grating couplers and Kretschmann configuration. Moreover, a computational analysis are demonstrated for three detection methods: Resonant angle, Resonant wavelength and Thickness of metal, in SPR sensors for both the SPR setups.