1. Extension of the discrete sources method to investigate the non-local effect influence on non-spherical core-shell particles
- Author
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Thomas Wriedt, Yuri Eremin, and Adrian Doicu
- Subjects
Physics ,Radiation ,010504 meteorology & atmospheric sciences ,Rotational symmetry ,Shell (structure) ,Physics::Optics ,Near and far field ,Atmosphärenprozessoren ,01 natural sciences ,Molecular physics ,Atomic and Molecular Physics, and Optics ,Blueshift ,Amplitude ,electromagnetic scattering ,Physics::Atomic and Molecular Clusters ,discrete sources method ,Surface plasmon resonance ,Refractive index ,Spectroscopy ,Plasmon ,0105 earth and related environmental sciences - Abstract
The Discrete Sources Method (DSM) has been extended to model non-spherical, axisymmetric core-shell particles by taking into account the Non-local Effect (NLE). For this purpose, the Generalized Non-local Optical Response (GNOR) model of the NLE has been employed. By using the extended DSM numerical scheme, prolate and oblate core-shell spheroidal particles have been examined. The simulation results show that the influence of the NLE on both the far and the near field properties of plasmonic core-shell particles is essential. In particular it has been found that the plasmon resonance amplitude is decreased by about 40%, the near field intensity is reduced up to one order of a magnitude, and the blue shift of the plasmon resonance can reach value of 15 nm. Besides, it has been demonstrated that a larger shell refractive index leads to a higher value of the plasmon resonance.
- Published
- 2019