Study of titanium nitride (TiN) as a novel plasmonic material for realization of Tamm-plasmon-polariton-based blood plasma sensor

摘要

Abstract This research exhibits a design of a novel Tamm plasmon polariton (TPP) sensor using TiN integrated 1D photonic crystal (PhC), where the PhC is realized with an alternate arrangement of MgF2 and BaTiO3 layers. The plasmonic characteristics of TiN are explored through the analysis of reflectance spectrum by employing transfer matrix technique. The defect layer, which is located between TiN and PhC, is infiltrated with blood containing different plasma concentrations. The mainstay of this research is to measure the shift in the TPP mode position vis-à-vis different plasma concentrations. Numerous geometrical parameters like thickness of the TiN layer, period of the PhC, and angle of incidence are thoroughly optimized to envisage highest sensing performance. We obtained an optimum sensitivity, quality factor, and detection limit of 2385.01 nm/RIU, 775.87 and 1.257×10-4documentclass12pt{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} begin{document}$$1.257 times 10^{ - 4}$$end{document} respectively. Moreover, it is ascertained that by using TiN as the metal layer, the sensitivity is boosted by 13.8 compared to the use of traditional metal like Ag. The outcomes of this work can be very useful for designing sensing devices based on TPPs.