An Analysis on the Performance of the Prism Based SPR Sensor with Composite of Indium Tin Oxide and Gold
J. Environ. Nanotechnol., Volume 3, No (Special Issue) (2014) pp. 21-25
Abstract
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.
Full Text
Reference
Kretchmann, E. and Reather, H. Naturforsch., Radiative decay of non radiative surface plasmons excited by light, 23, 2135-2136 (1968).
Kretchmann, E., The determination of the Optical Constants of Metals by Excitation of Surface Plasmons, Z. Phys., 241, 313-324 (1971).
Navneet K. Sharman, Swati Yadav. and Vivek Sajal, Theoretical analysis of highly sensitive prism based surface Plasmon resonance sensor with indium tin oxide, Opt. commun., 318, 74–78 (2014).
doi:10.1016/j.optcom.2013.12.049
Verma, R. K. and Gupta, B. D., Surface plasmon resonance based fiber optic sensor for the IR region using conducting metal oxide film, J. Opt. Soc. Am. A., 27, 846-851 (2010).
doi:10.1364/JOSAA.27.000846
Mishra, S. K. and Gupta, B. D., Surface plasmon resonance based fiber optic hydrogen gas sensor utilizing indium-tin oxide (ITO) thin films, Plasmon, 7, 627-632 (2012).
doi:10.1007/s11468-012-9351-7
Rani, M., Sharma, N. K. and Sajal, V., Surface plasmon resonance based fiber optic sensor with nanoparticles, Opt. Commun., 292, 92-100 (2013).
doi:10.1016/j.optcom.2012.11.087
Sharma, N. K. Rani, M. and Sajal, V., Surface plasmon resonance based fiber optic sensor with double resonance dips, Sens. Actuat. B., 188, 326-333 (2013).
doi:10.1016/j.snb.2013.07.007
Singh, S. and Gupta, B. D., Simulation of a surface plasmon resonance-based fiber-optic sensor for gas sensing in visible range using films of nano composites, Meas. Sci. Technol., 21, 115202 (2010).
doi:10.1088/0957-0233/21/11/115202
Roy, R. K., Mandal, S. K. and Pal, A. K., Effect of interfacial alloying on the surface plasmon resonance of nanocrystalline Au–Ag multilayer thin films, Eur. Phys. J. B., 33, 109–14 (2003).
doi:10.1140/epjb/e2003-00147-x
Rhodes, C., Cerruti, M., Efremenko, A., Losego, M., Aspnes, D. E., Maria, J. P. and Franzen, S., Dependence of plasmon polaritons on the thickness of indium tin oxide thin films, J. Appl. Phys., 103, 093108 (2008).
doi:10.1063/1.2908862
Hecht, E., Optics, fourth ed., Pearson Education Inc. 431–436 (2002). Ghatak, A. and Thyagarajan, K., An Introduction to Fiber Optics, Cambridge University Press, Cambridge (1999).