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Theoretical Calculation of the Optical Properties of Dielectric Material @ Noble Metal Core-Shell Composite Nanoparticles

Affiliations

  • School of Science and Mathematics, Rajamangala University of Technology, Isan Sakon Nakhon Campus, Sakon Nakhon, 47160, Thailand
  • Department of Physics, Mahasarakham University, Maha Sarakham, 44150, Thailand
  • Department of Applied Science and Engineering, Khon Kaen University, Khon Kaen, 40002, Thailand

Abstract


Objectives: Surface plasmon exhibited in nano-sized particles such as gold, silver, copper has recently attracted a great deal of attention due to the enhancement and tunable optical properties in the visible to near-infrared region of the electromagnetic spectrum. In this work, the optical properties of dielectric material at noble metal core-shell nanoparticles were investigated. Methods: Mie theory is the analytical method is used to study via parameters of extinction, scattering and absorption efficiencies. The samples for studying were the composites of a dielectric material core coated by a thin noble metal (Ag, Au, and Cu). The core size was fixed at 50 nm, while the metal shell thicknesses were varied from 3 nm to 40 nm. Findings: The calculated optical properties were found that the surface plasmon resonance can be enhanced and tuned the wavelength from the near ultraviolettonear infrared regions by varying the shell thickness. Application: The dielectric core coated with a thin noble metal to promote the properties of the core can be applied in the field of plasmonic nanolaser, nonlinear plasmonic antenna, light trapping in thin-film organic solar cells, and biomedical research.

Keywords

Dielectric Material @ Noble Metal Core-Shell, Surface Plasmon

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