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, Department of Electronics and Communication Engineering, Jayaraj Annapackiam CSI College of Engineering, Nazareth, TN, India. M. Agalya, Department of Physics, PSGR Krishnammal College for women, Coimbatore, TN. India S. Subanya, Department of Physics, PSGR Krishnammal College for women, Coimbatore, TN. India M. Lavanya 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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