Toy model of harmonic and sum frequency generation in 2D dielectric nanostructures

Optical nonlinearities of matter are often associated with the response of individual atoms. Here, using a toy oscillator model, we show that in the confined geometry of a two-dimensional dielectric nanoparticle a collective nonlinear response of the atomic array can arise from the Coulomb interacti...

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Bibliographic Details
Published inScientific reports Vol. 11; no. 1; p. 20120
Main Authors Xu, Jie, Savinov, Vassili, Plum, Eric
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 11.10.2021
Nature Publishing Group
Nature Portfolio
Subjects
639/301/1019/1015
639/301/1019/385
639/624/399/354
639/766/400/385
639/766/400/3923
639/925/357/1015
639/925/357/354
Humanities and Social Sciences
multidisciplinary
Nanoparticles
Nonlinear systems
Science
Science (multidisciplinary)
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Summary:Optical nonlinearities of matter are often associated with the response of individual atoms. Here, using a toy oscillator model, we show that in the confined geometry of a two-dimensional dielectric nanoparticle a collective nonlinear response of the atomic array can arise from the Coulomb interactions of the bound optical electrons, even if the individual atoms exhibit no nonlinearity. We determine the multipole contributions to the nonlinear response of nanoparticles and demonstrate that the odd order and even order nonlinear electric dipole moments scale with the area and perimeter of the nanoparticle, respectively.
Bibliography:ObjectType-Article-1
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-99567-4