Plasmonics

Influence of surface quantum effects on optical characteristics of a pair of plasmonic nanoparticles

Yu. A. Eremin, V. V. Lopushenko

Lomonosov Moscow State University, Moscow, Russia

Abstract: The influence of quantum effects, such as spatial nonlocality and splitting of electron cloud near the surface, on the extinction cross-section and field intensity in the gap between particles was analyzed via the Discrete Source Method using a pair of plasmonic gold nanoparticles. In this case, spatial nonlocality is described within the framework of the Generalized Nonlocal Optical Response Theory, while the splitting of the electron cloud is accounted for by using the theory of mesoscopic boundary conditions with Feibelman parameters. It has been found that mesoscopic boundary conditions lead to restoring of the plasmon resonance amplitude compared to the volume nonlocal effect.

Keywords: Discrete Source Method, nonlocal effect, mesoscopic boundary conditions, Feibelman parameters.

Received: 07.07.2023
Revised: 04.09.2023
Accepted: 06.09.2023

DOI: 10.61011/OS.2023.08.56308.5402-23

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