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.

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

Zilli A.;Finazzi M.;Celebrano M.;
2021-01-01

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.
2021
Proceedings of SPIE - The International Society for Optical Engineering
9781510643741
9781510643758
Metal-dielectric
Metamaterials
Multilayers
Nanocavities
Nanophotonics
Nonlinear optics
Plasmonics
Second-harmonic generation
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1208289
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