Modeling and Optimization of Surface Plasmon Resonance Sensors Using Metamaterials

Abstract

Surface Plasmon Resonance (SPR) phenomenon of metamaterial have been observed using a modified Kretschmann configuration. The observation was carried out through simulation Ansys Lumerical software and compared with some experimental data refractive index (n), absorbance index <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\kappa)$</tex> , and thickness <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\tau)$</tex> reported in other literatures. This simulation assumed that the SPR system use SF-10 prism <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\mathrm{n}= 1,723$</tex> ) and the laser beam was generated by He-Ne <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$(\lambda=632,8$</tex> nm). The result showed that the optimum layer thickness of metamaterial with the additional of Gold, Copper, and Silver is of about 150 nm. The metamaterial with the additional of these materials showed that the reflectivity curve is sharper and the width of the curve is smaller than the neutral electrolyte solution in the reduction state with the SPR angle of about 44.80 and the reflectivity value of about 0,015. Metamaterial with the additional of other materials, related to the absorption, film thickness, and dielectric constant of materials, affected to the SPR angle shift and dip curve.