Simulations of optical and dielectric properties of plasmonic Ag-LiNbO3 metamaterial: Analysis of the geometrical parameters Articles uri icon

publication date

  • October 2024

start page

  • 1

end page

  • 12

issue

  • 130783

volume

  • 569, (130783)

International Standard Serial Number (ISSN)

  • 0030-4018

Electronic International Standard Serial Number (EISSN)

  • 1873-0310

abstract

  • We report the optical absorption of a multilayer system and the electrical properties of silver (Ag) nanoparticles (NPs) embedded in LiNbO3 that acts as active layer. The effective dielectric function of the emsemble aggregates of Ag NPs and uniaxial LiNbO3 crystal are treated through the extended Maxwell-Garnett approximation. The multilayer absorbance for s- and p-polarization at normal and oblique incidences is determined by means of the Transfer Matrix Method. We demonstrate that an adequate choice of structural parameters can produce an enhancement of optical absorption in the multilayer. We find at filling factor sufficiently high, the negative epsilon condition, typical characteristic observed in metamaterial. A bigger concentration of Ag NPs induces a higher intensity of ac-conductivity.

subjects

  • Physics

keywords

  • absorption; ac-conductivity; ag-linbo3; simulations; geometry