Multiply-resonant second-harmonic generation using surface lattice resonances in aluminum metasurfaces

Timo Stolt, Anna Vesala, Heikki Rekola, Petri Karvinen, Tommi K. Hakala, Mikko J. Huttunen

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Nonlinear metamaterials show potential for realizing flat nonlinear optical devices but are generally lacking in terms of achievable conversion efficiencies. Recent work has focused on enhancing nonlinear processes by utilizing high quality factor resonances, such as collective responses known as surface lattice resonances (SLRs) taking place in periodic metal nanoparticle arrays. Here, we investigate how the dispersive nature of SLRs affects the nonlinear responses of SLR-supporting metasurfaces. Particularly, we measure second-harmonic generation from aluminum nanoparticle arrays and demonstrate that by tilting the sample along two orthogonal directions, the sample can be made multiply-resonant for several pump and second-harmonic signal wavelength combinations. Characterized metasurfaces are estimated to exhibit a second-order susceptibility value of 0.40 pm/V, demonstrating aluminum as a potential material for nonlinear metasurfaces.

Original languageEnglish
Pages (from-to)3620-3631
Number of pages12
JournalOptics Express
Issue number3
Publication statusPublished - Jan 2022
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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