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year 28, Issue 1 (1st Iranian Conference on optical fiber sensors (ICOFS 2021) 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 28(1): 1-3 |
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Jalal Jabar S, Kouhi M, Talebzadeh R. Investigation of Fiber Optic Surface Plasmon Resonance Biosensor Containing Graphene and Titanium Dioxide Thin Film. ICOP & ICPET _ INPC _ ICOFS 2021; 28 (1) :1-3
URL: http://opsi.ir/article-1-2490-en.html
URL: http://opsi.ir/article-1-2490-en.html
1- Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
2- Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, Iran, Biophotonic Research Center, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
2- Department of Physics, Tabriz Branch, Islamic Azad University, Tabriz, Iran, Biophotonic Research Center, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
Abstract: (1231 Views)
In this paper, a fiber optic surface plasmon resonance biosensor with hybrid layers of graphene and titanium dioxide is proposed to increase efficiency. The normalized transmission power and resonance wavelength have been calculated by the transfer matrix method. With increasing the refractive index of the sensing medium, the resonance wavelengths are shifted to the larger wavelengths. The rate of the increase in resonance wavelength increases with the increasing refractive index of the sensing medium. Therefore, in the range of larger refractive index of the sensing medium, greater sensitivity is obtained. The results show that the sensitivity of the biosensor increases with the use of the titanium dioxide thin layer. By adding a 5 nm thick layer of titanium dioxide before the graphene layer, the sensitivity of the biosensor was increased from 2350 nm/RIU to 2600 nm/RIU.
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