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>Theory and FTDT simulations of an amorphous silicon planar waveguide structure suitable to be used as a surface plasmon resonance biosensor
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Theory and FTDT simulations of an amorphous silicon planar waveguide structure suitable to be used as a surface plasmon resonance biosensor
In this paper we present our work concerning the design of a semiconductor waveguide structure to be used asa biosensor based on Surface Plasmonic Resonance effects (SPR). The proposed structure is a planar metaldielectricwaveguide where the sensor operation is based on the coupling between the fundamentalpropagation TM mode and the surface plasmon excited at the outer boundary of the metal, which interfacesthe sample medium. Gold and aluminium are the metals considered for the plasmonic coating, amorphoussilicon and a reduced graphene oxide layer are considered for the waveguide structure. FDTD simulations ofthe proposed structure show a clear attenuation peak in the output power at the wavelength where theplasmonic resonance is excited.
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