Enhanced Terahertz Shielding of MXenes with Nano-Metamaterials

Geunchang Choi, Faisal Shahzad, Young Mi Bahk, Young Min Jhon, Hyunchul Park, Mohamed Alhabeb, Babak Anasori, Dai Sik Kim, Chong Min Koo, Yury Gogotsi, Minah Seo

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Terahertz (THz) shielding becomes increasingly important with the growing development of THz electronics and devices. Primarily materials based on carbon nanostructures or polymer–carbon nanocomposites have been explored for this application. Herein, significantly enhanced THz shielding efficiencies for 2D titanium carbide (Ti 3 C 2 MXene) thin films with nanoscale THz metamaterials are presented. Nanoscale slot antenna arrays with strong resonances at certain frequencies enhance THz electromagnetic waves up to three orders of magnitude in transmission, which in turn enormously increases the shielding performance in combination with MXene films. Drop-casting of a colloidal solution of MXene (a few micrograms of dry material) can produce an ultrathin film (several tens of nanometers in thickness) on a slot antenna array. Consequently, THz waves strongly localized in the near-field regime by the slot antenna undergo enhanced absorption through the film with a magnified effective refractive index. Finally, the combination of an ultrathin MXene film and a nano-metamaterial shows excellent shielding performance in the THz range.

Original languageEnglish
Article number1701076
JournalAdvanced Optical Materials
Volume6
Issue number5
DOIs
Publication statusPublished - 2018 Mar 5

Keywords

  • 2D materials
  • metamaterials
  • MXene
  • shielding efficiency
  • terahertz spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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    Choi, G., Shahzad, F., Bahk, Y. M., Jhon, Y. M., Park, H., Alhabeb, M., Anasori, B., Kim, D. S., Koo, C. M., Gogotsi, Y., & Seo, M. (2018). Enhanced Terahertz Shielding of MXenes with Nano-Metamaterials. Advanced Optical Materials, 6(5), [1701076]. https://doi.org/10.1002/adom.201701076