Tunable subwavelength focusing with slit-groove-based metamaterials in THz

Jinho Lee, Kwangchil Lee, Haesung Park, Gumin Kang, Kyoungsik Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We design the THz lens made of slit-groove-based metamaterials with tunable far-field focal length as well as subwavelength resolution, based on surface plasmons(SP) diffraction theory into spoof SP of THz region. In THz regime, the curved depth profile of grooves from both sides of metal slit produce directional beaming and mimic SP at the same time. By arranging the depth of grooves in traced profile, it is possible to optimize the focal position in THz region without changing the size of structure. It is performed numerical simulation of a designed structure through finitedifference time-domain (FDTD) method and shows the subwavelength imaging of the designed position. In addition, the change of focal length and the relative Ex phase are observed in the simulation and help to comprehend a subwavelength 1D slit-groove-based metamaterials in THz regime.

Original languageEnglish
Title of host publicationMetamaterials
Subtitle of host publicationFundamentals and Applications III
Publication statusPublished - 2010 Dec 1
EventMetamaterials: Fundamentals and Applications III - San Diego, CA, United States
Duration: 2010 Aug 12010 Aug 5

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherMetamaterials: Fundamentals and Applications III
CountryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Lee, J., Lee, K., Park, H., Kang, G., & Kim, K. (2010). Tunable subwavelength focusing with slit-groove-based metamaterials in THz. In Metamaterials: Fundamentals and Applications III [77541I] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7754). https://doi.org/10.1117/12.861023