Open Access

Investigation on the Performance of the Prism Based SPR Sensor with Composite of Indium Nitrate and Gold

K. B. Rajesh, rajeskb@gmail.com
Department of Physics, Chikkanna Government Arts College, Tiruppur, TN, India N. Veerabagu Suresh, rajeskb@gmail.com
Department of Electronics and Communication Engineering, Jayaraj Annapackiam CSI College of Engineering, Nazareth, TN, India. M. Agalya, rajeskb@gmail.com
Department of Physics, PSGR Krishnammal College for women, Coimbatore, TN. India S. Subanya, rajeskb@gmail.com
Department of Physics, PSGR Krishnammal College for women, Coimbatore, TN. India M. Lavanya rajeskb@gmail.com
Department of Physics, PSGR Krishnammal College for women, Coimbatore, TN. India

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Abstract

The performance of the SPR sensor is analysed numerically by employing three prisms of different refractive indices coated with a composite of Indium Nitrate (InN) and gold of different film thickness. The reflection spectra are studied under the angular interrogation mode and the effects of low- and highrefractive- index prisms on the performance of the sensors are discussed. It is observed that composite of gold metal with 10% of InN has given maximum shift of resonance angle (8.25°) and smaller FWHM of resonance curve (6.19°) for the film thickness of 45nm when changing the refractive index of the sensing medium from 1.33 to 1.36 for the prism with refractive index of 1.456.

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