Nano Convergence (Sep 2022)

Self-assembled pagoda-like nanostructure-induced vertically stacked split-ring resonators for polarization-sensitive dichroic responses

  • Sanghoon Kim,
  • Chunghwan Jung,
  • Jungho Mun,
  • Mooseong Kim,
  • Hyeongkeon Yoon,
  • Junho Jang,
  • Myeongcheol Go,
  • Jaeyong Lee,
  • Junsuk Rho,
  • Jin Kon Kim

DOI
https://doi.org/10.1186/s40580-022-00331-9
Journal volume & issue
Vol. 9, no. 1
pp. 1 – 7

Abstract

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Abstract 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.

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