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Enhanced Second-Harmonic Generation with Structured Light in AlGaAs Nanoparticles Governed by Magnetic Response
- Authors
- Melik-Gaykazyan, E. V.; Koshelev, K. L.; Choi, J. -H.; Kruk, S. S.; Park, H. -G.; Fedyanin, A. A.; Kivshar, Y. S.
- Issue Date
- 1월-2019
- Publisher
- MAIK NAUKA/INTERPERIODICA/SPRINGER
- Citation
- JETP LETTERS, v.109, no.2, pp.131 - 135
- Indexed
- SCIE
SCOPUS
- Journal Title
- JETP LETTERS
- Volume
- 109
- Number
- 2
- Start Page
- 131
- End Page
- 135
- ISSN
- 0021-3640
- 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 the magnetic dipole resonance, and match our observations with the numerical decomposition of the Mie-type multipoles for the fundamental and generated second-harmonic fields.
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