English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Optical nonlinearities of matter are often associated with the response ofindividual atoms. Here, using a toy oscillator model, we show that in theconfined geometry of a two-dimensional dielectric nanoparticle a collectivenonlinear response of the atomic array can arise from the Coulomb interactionsof the bound optical electrons, even if the individual atoms exhibit nononlinearity. We determine the multipole contributions to the nonlinearresponse of nanoparticles and demonstrate that the odd order and even ordernonlinear electric dipole moments scale with the area and perimeter of thenanoparticle, respectively.

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