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Abstract <p>The results of experimental studies of chiral film structures based on arrays of cobalt nanohelixes obtained by oblique angle deposition on a transparent substrate are presented. Under electron-beam evaporation conditions, an array of nanohelixes twisted in one direction is formed on a rotating tilted substrate. By varying the substrate rotation speed, the geometric dimensions of the nanohelixes (helix pitch, helix radius) can be altered. The chiral thin-film metamaterials obtained in this manner have been shown to exhibit pronounced circular dichroism, which can be used to create photonic elements, including those controlled by magnetic fields.</p>

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Circular Dichroism in Chiral Metamaterials Based on Nanostructured Cobalt Films

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • O. S. Trushin,
  • I. S. Fattakhov,
  • D. R. Titov,
  • A. A. Popov,
  • L. A. Mazaletskiy,
  • A. S. Fedorov,
  • M. V. Logunov

摘要

Abstract

The results of experimental studies of chiral film structures based on arrays of cobalt nanohelixes obtained by oblique angle deposition on a transparent substrate are presented. Under electron-beam evaporation conditions, an array of nanohelixes twisted in one direction is formed on a rotating tilted substrate. By varying the substrate rotation speed, the geometric dimensions of the nanohelixes (helix pitch, helix radius) can be altered. The chiral thin-film metamaterials obtained in this manner have been shown to exhibit pronounced circular dichroism, which can be used to create photonic elements, including those controlled by magnetic fields.