Abstract
In this paper, we analyze the SPR fiber optic sensor based on array of 10-gold nanorods which are circular in shape. The proposed structure of the sensor is simulated using COMSOL multyphysics FEM method simulation software. Circular shape of the gold nanorod has been chosen for the optimal performance of the sensor in sensing of the particular refractive index. We simulate the sensor with optimized size of the gold nanorods and fiber parameters for best performance. We have shown that how the size of circular gold nanorod effects the sensitivity of the sensor. The maximum sensitivity exhibited by the sensor is 2200 nm.RIU-1. From the simulated data, we have found that co-efficient of determination (COD) is very high. Improved sensitivity and high co-efficient of determination are achieved after sensor structural optimization. The proposed sensor structure can be useful in label-free optical platform for bio-sensing applications.
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