Enhanced second-harmonic generation by single metal–insulator multilayered nanocavities with axial symmetry resonating in the near-infrared

Attilio Zilli; Tommi Isoniemi; Marzia Iarossi; Marco Finazzi; Francesco De Angelis; Michele Celebrano; Nicolò Maccaferri

doi:10.1117/12.2589836

18 April 2021 Enhanced second-harmonic generation by single metal–insulator multilayered nanocavities with axial symmetry resonating in the near-infrared

Attilio Zilli, Tommi Isoniemi, Marzia Iarossi, Marco Finazzi, Francesco De Angelis, Michele Celebrano, Nicolò Maccaferri

Author Affiliations +

Proceedings Volume 11770, Nonlinear Optics and Applications XII; 117700Y (2021) https://doi.org/10.1117/12.2589836
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

We report efficient second-harmonic emission by single multilayer metal–dielectric nanocavities. Engineering the intrinsic interface-induced symmetry breaking by resonant optical absorption design, allows to achieve almost two orders of magnitude higher second-harmonic generation efficiency compared to gold nanostructures with the same geometry. We estimate a second-order nonlinear susceptibility of the order of 1 pm/V, which is comparable to widely used nonlinear crystals. We envision that our system, which combines the advantages of both plasmonic and dielectric materials, might enable the realization of composite nano-systems for an efficient multi-purpose manipulation of nonlinear optical processes at the nanoscale.

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Attilio Zilli, Tommi Isoniemi, Marzia Iarossi, Marco Finazzi, Francesco De Angelis, Michele Celebrano, and Nicolò Maccaferri "Enhanced second-harmonic generation by single metal–insulator multilayered nanocavities with axial symmetry resonating in the near-infrared", Proc. SPIE 11770, Nonlinear Optics and Applications XII, 117700Y (18 April 2021); https://doi.org/10.1117/12.2589836

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