Open AccessTerahertz response of plasmonic nanoparticles: Plasmonic Zeeman Effect
Author(s) -
Alma Herrera Márquez,
R. EsquivelSirvent
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.412585
Subject(s) - plasmon , zeeman effect , terahertz radiation , magnetic field , condensed matter physics , physics , metamaterial , surface plasmon , optics , materials science , optoelectronics , quantum mechanics
Magnetoplasmons are the coupling of an external magnetic field and a plasmon or a localized plasmon, in the case of nanoparticles. We present a theoretical study, in the quasi-static limit, of the plasmonic response of nanoparticles when a constant magnetic field is applied. The plasmonic modes split into two satellite peaks with a frequency shift proportional to the magnetic field. The constant of proportionality is the effective Bohr magneton. This splitting of the fundamental plasmonic mode is akin to the splitting of energy levels in the Zeeman effect. The results are valid for any material that has a plasmonic response. For higher magnetic fields, the frequency shift of the splitting becomes non-linear with the magnetic field as what happens with the non-linear Zeeman effect.