Browsing by Author "Veerabagu Suresh N"

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    AN ANALYSIS ON THE PERFORMANCE OF THE PRISM BASED SPR SENSOR WITH COMPOSITE OF INDIUM TIN OXIDE AND GOLD
    (Journal of Environmental NanoTechnology, 2014-10-03) Veerabagu Suresh N; Agalya M; Subanya; Lavanya M; Rajesh K B
    In this paper, we theoretically studied the role of the prism material in sensor design of SPR-based sensor. We analysed the performance of three prisms of different refractive indices coated with composites of Indium tin oxide and gold with different thickness values. We studied the reflection spectra under the angular interrogation mode and the performance are evaluated by employing two main parameters such as sensitivity and Full width Half Maximum (FWHM) of resonance curve. It is found that 10% of ITO hosted in metal matrix of gold gives the highest shift (8.14˚) in resonance angle and least FWHM (5.15˚) of the resonance curve for the film thickness of 50nm for the prism of np=1.456.
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    EXCITATION OF SURFACE PLASMON ON GRAPHENE COATED METAL LAYER BY RADIALLY POLARIZED BESSEL GAUSSIAN BEAM
    (Bharathiar University, 2013-02-01) Veerabagu Suresh N; Lavanya M; Subanya S; Rajesh K B
    Rapid advance of nano structuring technologies offers new possibilities for flexible and low-cost fabrication of plasmonic components and devices. When a radially polarized Bessel Gaussian beam is focused onto a metal-dielectric interface, the entire beam is TM polarized with respect to the interface. Consequently surface plasmons can be excited at all directions. These surface plasmons will propagate to the geometric center, constructively interfere with each other and generate a strongly focused evanescent non diffracting Bessel beam. In this paper, we analysed the excitation of surface plasmon polaritons SPP by focusing a radially polarised Bessel Gaussian beam on a Chalcogenide glass plate and a gold layer coated with a thin layer of graphene. The graphene layer is used to enhance the adsorption of biomolecules. However the change in the intensity distribution of the generated surface plasmon owing to the presence of graphene layer is very important and is analysed numerically in this work.
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    INVESTIGATION ON THE PERFORMANCE OF THE PRISM BASED SPR SENSOR WITH COMPOSITE OF INDIUM NITRATE AND GOLD
    (Journal of Environmental Nanotechnology, 2014-12) Veerabagu Suresh N; Agalya M; Subanya S; Lavanya M; Rajesh K B
    In this paper, we theoretically studied the role of the prism material in sensor design of SPR-based sensor. We analysed the performance of three prisms of different refractive indices coated with composites of Indium tin oxide and gold with different thickness values. We studied the reflection spectra under the angular interrogation mode and the performance are evaluated by employing two main parameters such as sensitivity and Full width Half Maximum (FWHM) of resonance curve. It is found that 10% of ITO hosted in metal matrix of gold gives the highest shift (8.14Ëš) in resonance angle and least FWHM (5.15Ëš) of the resonance curve for the film thickness of 50nm for the prism of np=1.456.