Investigation of non-spherical core-shell nano particles considering the non-local effect

• Applicant: Dr.-Ing. Thomas Wriedt
• Subject Area: Mechanical Process Engineering
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 437616189

• Final Report Year: 2023

Final Report Abstract

Within this project collaboration between the Bremen and the Moscow research groups was extended but stopped because of the Russian war. We extended the Discrete Source Method (DSM) by incorporating the GNOR model to treat core-shell Diel@Me particles deposited on a prism surface accounting for the spatial dispersion in the thin metallic nano-shell. Within this collaborative project five papers have been published. As the newly developed extended version of the DSM seems to be quite versatile there will be further papers on this topic by the Moscow team. We are lucky that within the project we also managed to extend the Null-Field Method with Discrete Sources using two methods for deriving the transition matrix of a nonspherical particle in the non-local optical response theory, which is important for particles of size below about 10 nm. Because of this we do not think that the stop of the Moscow Bremen collaboration because of the Russian war will hinder the German progress in this field and further paper on this topic are expected in near future.

Publications

• Influence of the Nonlocal Effect on the Optical Properties of Nonspherical Plasmonic Semiconductor Nanoparticles. Computational Mathematics and Modeling, 31(1), 58-74.
  Eremin, Yu. A.; Mädler, L. & Wriedt, T.
  
• Numerical method for analyzing the near-field enhancement of nonspherical dielectric-core metallic-shell particles accounting for the nonlocal dispersion. Journal of the Optical Society of America A, 37(7), 1135.
  Eremin, Yuri; Doicu, Adrian & Wriedt, Thomas
  
• Transition matrix of a nonspherical particle in the non-local optical response theory. Journal of Quantitative Spectroscopy and Radiative Transfer, 242, 106756.
  Doicu, Adrian; Eremin, Yuri & Wriedt, Thomas
  
• Discrete sources method for investigation of near field enhancement of core-shell nanoparticles on a substrate accounting for spatial dispersion. Journal of Quantitative Spectroscopy and Radiative Transfer, 259, 107405.
  Eremin, Yuri; Doicu, Adrian & Wriedt, Thomas
  
• Generalization of the Optical Theorem to an Arbitrary Multipole Excitation of a Particle near a Transparent Substrate. Mathematics, 9(24), 3244.
  Eremin, Yuri A. & Wriedt, Thomas