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  • Self-assembled pagoda-like ...
    Kim, Sanghoon; Jung, Chunghwan; Mun, Jungho; Kim, Mooseong; Yoon, Hyeongkeon; Jang, Junho; Go, Myeongcheol; Lee, Jaeyong; Rho, Junsuk; Kim, Jin Kon

    Nano convergence, 09/2022, Volume: 9, Issue: 1
    Journal Article

    Stacked split-ring resonators (SSRR) arrays exhibiting polarization-sensitive dichroic responses in both visible and near-infrared wavelengths are realized over a centimeter-scale large area. The SSRR arrays are derived from pagoda-like nanorods fabricated from the self-assembly of a lamellae-forming polystyrene- b -poly (methyl methacrylate) copolymer (PS- b -PMMA) confined in cylindrical pores of anodized aluminum oxide (AAO) template. Along the nanorod direction, PS and PMMA nanodomains were alternately stacked with the same distance. Silver crescents and semi-hemispherical covers, which are essential for SSRR with the polarization sensitivity, were obliquely deposited on the single side of the nanorod after removing the AAO template and reactive-ion etching treatment. These sophisticated nanoscale architectures made by bottom-up fabrication can be applied to structural color, optical anti-counterfeiting, and commercial optical components in a large area.