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arXiv · 1811.08680

Enhanced second-harmonic generation with structured light in AlGaAs nanoparticles governed by magnetic response

Elizaveta V. Melik-Gaykazyan·Kirill L. Koshelev·Jae-Hyuck Choi·Sergey S. Kruk·Hong-Gyu Park·Andrey A. Fedyanin·Yuri S. Kivshar
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Abstract

We employ structured light for the second-harmonic generation from subwavelength AlGaAs nanoparticles that support both electric and magnetic multipolar Mie resonances. The vectorial structure of the pump beam allows addressing selectively Mie-resonant modes and control the strength of the generated nonlinear fields. We observe experimentally the enhancement of the second-harmonic generation for the azimuthally polarized vector beams near magnetic dipole resonance, and match our observations with the numerical decomposion of the Mie-type multipoles for the fundamental and generated second-harmonic fields

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Elizaveta V. Melik-Gaykazyan, Kirill L. Koshelev, Jae-Hyuck Choi, Sergey S. Kruk, Hong-Gyu Park, Andrey A. Fedyanin, Yuri S. Kivshar. 2018-11-21. Enhanced second-harmonic generation with structured light in AlGaAs nanoparticles governed by magnetic response. https://doi.org/10.1134/s0021364019020036

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