Kruk, Sergey; Weismann, M; Bykov, A Yu; Mamonov, EA; Kolmychek, IA; Murzina, TV; Panoiu, NC; Neshev, Dragomir; Kivshar, Yuri
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...[Show more]
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