Metamaterials with tailored nonlinear optical response.
We demonstrate that the second-order nonlinear optical response of noncentrosymmetric metal nanoparticles (metamolecules) can be efficiently controlled by their mutual ordering in an array. Two samples with minor change in ordering have nonlinear responses differing by a factor of up to 50. The results arise from polarization-dependent plasmonic resonances modified by long-range coupling associated with metamolecular ordering. The approach opens new ways for tailoring the nonlinear responses of metamaterials and their tensorial properties.
Department of Physics, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland. hannu.husu@tut.fi
Hannu
H
Husu
Roope
R
Siikanen
Jouni
J
Mäkitalo
Joonas
J
Lehtolahti
Janne
J
Laukkanen
Markku
M
Kuittinen
Martti
M
Kauranen
D053768:Metal Nanoparticles / Q000737:chemistry*; D017711:Nonlinear Dynamics; D055620:Optical Phenomena