Abstract
We study, both experimentally and theoretically, the second-order nonlinear response from resonant metasurfaces composed of metal-dielectric nanodisks. We demonstrate that by exciting the resonant optical modes of the composite nanoparticles we can achieve strong enhancement of the second-harmonic signal from the metasurface. By employing a multipole expansion method for the generated second-harmonic radiation, we show that the observed SHG enhancement is due to the magnetic dipolar and electric quadrupolar second-order nonlinear response of the metasurface.
Original language | English |
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Pages (from-to) | 1007-1012 |
Number of pages | 6 |
Journal | ACS Photonics |
Volume | 2 |
Issue number | 8 |
DOIs | |
Publication status | Published - 19 Aug 2015 |