Surface Plasmon Resonance Sensors for Disease Diagnosis
نویسنده
چکیده
Most of the optical sensors based on surface plasmon resonance (SPR) are imitated from two main configurations. Firstly, in the KretschmannRaether configuration, a thin metal layer is sandwiched between the prism and the air. Otherwise, the Otto configuration, there is a gap between the metal and the prism. However, the Kretschmann-Raether geometry is more conventional scheme to generate the surface plasmon wave in sensing technique [1]. The incident light wave is also transverse magnetic wave (TM wave) that can be existed on the metal-air interface and used to excite the SPR under the boundary condition [2]. Most of optical excitation of surface plasmon is based on prism [3], waveguide [4], optical fiber [5] and grating [6]. The SPR wave is described as an electromagnetic wave propagating along the interface between metal and dielectric medium. For three layers system, glass/metallic/analyzed solution, the propagation constant (β) of the surface plasmon wave propagated along the metal-analyze solution interface and the angular frequency, which can be described in the following
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تاریخ انتشار 2017