Cross-polarized surface lattice resonances in a rectangular lattice plasmonic metasurface

M. Saad Bin-Alam, Orad Reshef, Raja Naeem Ahmad, Jeremy Upham, Mikko J. Huttunen, Ksenia Dolgaleva, Robert W. Boyd

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Multiresonant metasurfaces could enable many applications in filtering, sensing, and nonlinear optics. However, developing a metasurface with more than one high-quality-factor or high-Qresonance at designated resonant wavelengths is challenging. Here, we experimentally demonstrate a plasmonic metasurface exhibiting different, narrow surface lattice resonances by exploiting the polarization degree of freedom where different lattice modes propagate along different dimensions of the lattice. The surface consists of aluminum nanostructures in a rectangular periodic lattice. The resulting surface lattice resonances were measured around 640 nm and 1160 nm with Q factors of ∼50 and ∼800, respectively. The latter is a record-high plasmonic Q factor within the near-infrared type-II window. Such metasurfaces could benefit such applications as frequency conversion and all-optical switching.

Original languageEnglish
Pages (from-to)2105-2108
Number of pages4
JournalOptics Letters
Issue number8
Publication statusPublished - 15 Apr 2022
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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