# Enhanced Second-Harmonic Generation with Structured Light in AlGaAs Nanoparticles Governed by Magnetic Response

@article{MelikGaykazyan2018EnhancedSG, title={Enhanced Second-Harmonic Generation with Structured Light in AlGaAs Nanoparticles Governed by Magnetic Response}, author={Elizaveta V. Melik-Gaykazyan and Kirill L. Koshelev and J.-H. Choi and Sergey S. Kruk and H.-G. Park and Andrey A. Fedyanin and Yuri S. Kivshar}, journal={JETP Letters}, year={2018}, volume={109}, pages={131-135} }

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 the magnetic dipole resonance, and match our…

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