Single-Layer Metasurfaces as Spectrally Tunable Terahertz Half- A nd Quarter-Waveplates

Seojoo Lee, Won Tae Kim, Ji Hun Kang, Bong Joo Kang, Fabian Rotermund, Q. Han Park

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


We propose a single-layer terahertz metasurface that acts as an efficient terahertz waveplate, providing phase retardation of up to 180° with a tunable operation frequency. Designed with the tight coupling of elementary resonators, our metasurface provides extraordinarily strong hyperbolicity that is closely associated with the distance between resonators, enabling both significant phase retardation and spectral tunability through mechanical deformation. The proposed concept of terahertz waveplates based on relatively simple metastructures fabricated on stretchable polydimethylsiloxane is experimentally confirmed using terahertz spectroscopy. It is believed that the proposed design will pave the way for a diverse range of terahertz applications.

Original languageEnglish
Pages (from-to)7655-7660
Number of pages6
JournalACS Applied Materials and Interfaces
Issue number8
Publication statusPublished - 2019 Feb 27


  • metamaterials
  • metasurfaces
  • phase retardation
  • terahertz spectroscopy
  • waveplate

ASJC Scopus subject areas

  • Materials Science(all)


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