Studying the scattering and absorption cross section in comparison with the field confinement in noble metal Gold and silver Nano wires

Reza Goodarzi¹ Mohammad Barzan² Hossein Shahrokhabadi³

1) Nuclear Science and Technology Research Institute
2) Nuclear Science and Technology Research Institute
3) Nuclear Science and Technology Research Institute

IOI Code : XCZB-FEHAA
Publication : Intl. Conference on Nanoscience and Nanotechnology(ut2020.ir)
Abstract :
    In this paper, the absorption and scattering cross-sections of silver and gold nanowires with 10, 20, 30, and 40 nm radiuses are investigated. It has been shown that by increasing the nanowire radius, the absorption and scattering cross-sections for both the silver and gold elements increase by 7 and 10 times, respectively. The adsorption and scattering peaks of the silver and gold nanoparticles were also 350 and 150 nm, respectively. In the following, the effect of scattered field confinement was studied by plotting the field amplitude density distribution around the nanowires. It was shown that the scattering of the light due to the presence of nanowires is substituted in the direction perpendicular to the direction of the wave propagation. By changing the radius of the nanowires, it was found that by decreasing the radius of the nanowire, the confining power will be increased, also the silver nanoparticles confining power is about twice of the gold nanowire value. It was concluded that silver nanowires could be used as suitable nanoparticles for light confinement and its application in the treatment of cancer.

Keywords : nano wire silver gold absorption and scattering cross section light confinement