Stacked complementary metasurfaces for ultraslow microwave metamaterials

Research output: Contribution to journalArticle


  • M. Aznabet
  • M. Beruete
  • F. Falcone
  • O. El Mrabet
  • M. Sorolla
  • M. Essaaidi

Colleges, School and Institutes

External organisations

  • Universidad Pública de Navarra
  • Abdelmalek Essaadi University


We have experimentally realized at microwaves a dual-band ultraslow regime by constructing a metamaterial based upon the alternative stack of conventional- and complementary-split-ring-resonators-surfaces. The group delay reaches values larger than two orders of magnitude than those obtained when the electromagnetic wave propagates the same thickness in free-space. The ultraslow waves have been initially predicted by a numerical eigenmode analysis and finite-integration frequency domain simulations. Such ultraslow modes can be integrated into free-space technology for spatial delay lines, and traveling wave amplifier as well as sensors due to the enhanced interaction between different beams or radiation and matter.


Original languageEnglish
Article number164103
JournalApplied Physics Letters
Issue number16
Publication statusPublished - 19 Apr 2010

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