Plasmonic fiber optic biosensors with barium titanate and titanium dioxide thin films

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Ahmed Abdulqadir Shateri Shahab; Kouhi Mohammad; Vahedi Ali

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Journal Paper

Paper Information

Journal: Iranian Journal of Physics Research Year:2022 | Volume:22 | Issue:2 (پیاپی 88) Page(s): 403-416

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Information Journal Paper

Title

Plasmonic fiber optic biosensors with barium titanate and titanium dioxide thin films

Author(s)

Ahmed Abdulqadir Shateri Shahab | Kouhi Mohammad | Vahedi Ali | Issue Writer Certificate

Keywords

surface plasmon resonance

optical fiber

biosensor

sensitivity of sensor

Abstract

In this paper, two structures of surface plasmon resonance fiber optic biosensors with the addition of a thin layer of titanium dioxide and barium titanate are introduced and studied comparatively. The sensitivity of these biosensors has been calculated using the transfer matrix method. Adding a thin layer of barium titanate and titanium dioxide after the gold layer, both make increase the sensitivity of the biosensor due to the transfer of free charge between the gold and the dielectric. The obtained results of the comparative study show that the titanium dioxide layer can be a suitable alternative to barium titanate for further increase of the sensitivity of the fiber optic surface plasmon resonance biosensor.

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