Sensitivity Enhancement of a Surface Plasmon Resonance Based Tapered Fiber Optic Sensor Using a High Index Dielectric Layer
نویسنده
چکیده
Surface plasmon resonance based tapered fiber optic refractive index sensor incorporating an additional high index dielectric layer between metal and sensing medium using wavelength interrogation method is analyzed. The simulation is carried out for gold and silver metals. The simulation predicts, for a given taper ratio, the increase in the sensitivity of the sensor with increase in the thickness of the dielectric layer. The sensitivity also increases with the increase in the taper ratio. The advantages of additional layer of dielectric, in addition to the increase in sensitivity, are the protection of metallic layer from oxidation and the tuning of wavelength range of operation of the sensor.
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