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

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

5 pages, 4 figures, submitted to JETP Letters

References in corpus (3)

• Electromagnetic multipole theory for optical nanomaterials
• Multipolar nonlinear nanophotonics
• Beam engineering for selective and enhanced coupling to multipolar resonances

Cited by in corpus (5)

• High-Q dielectric Mie-resonant nanostructures (a mini-review)
• Fast simulation of light scattering and harmonic generation in axially symmetric structures in COMSOL
• Enhanced third-harmonic generation and degenerate four-wave mixing in an all-dielectric metasurfaces via Brillouin zone folding-induced bound states in the continuum
• Directional emission of down-converted photons from a dielectric nano-resonator
• Second harmonic generation due to spatial structure of radiation beam