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Tailored Nonlinear Anisotropy in Mie‐Resonant Dielectric Oligomers
Author(s) -
Kroychuk Maria K.,
Yagudin Damir F.,
Shorokhov Alexander S.,
Smirnova Daria A.,
Volkovskaya Irina I.,
Shcherbakov Maxim R.,
Shvets Gennady,
Kivshar Yuri S.,
Fedyanin Andrey A.
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900447
Subject(s) - materials science , dielectric , isotropy , nanophotonics , nonlinear system , nonlinear optics , anisotropy , second harmonic generation , mie scattering , tensor (intrinsic definition) , symmetry (geometry) , condensed matter physics , homogeneous space , nanoparticle , molecular physics , light scattering , scattering , optics , nanotechnology , optoelectronics , physics , quantum mechanics , laser , mathematics , geometry , pure mathematics
The field of Mie‐resonant nanophotonics has attracted a lot of attention recently due to many promising applications in linear and nonlinear metaoptics. Optically induced magnetic resonances define novel characteristics of isolated high‐index dielectric nanoparticles and their oligomers. Here, the orientation‐dependent nonlinear frequency generation from dielectric oligomers with different symmetries, being all characterized by isotropic linear response, is demonstrated. The rotational dependence of the third‐harmonic signal emitted by the nanoparticle oligomers in accord with their point‐group symmetry (e.g., C3 or C4) is observed experimentally, while their linear scattering remains isotropic. The experimental data are in a good agreement with numerical simulations and the symmetry analysis of the nonlinear susceptibility tensor. The results open a new avenue for tailoring nonlinear properties of nanoscale structures.