Compact planar meta-lenses for nondiffracting surface wave deflection

Jie Zhou, Ping Lu*, Linkai Luo, Qian Liu, Enpu Lei, Kama Huang, Chaoyun Song

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A novel planar lens structure is proposed by using metasurfaces to convert cylindrical-like surface wave to inclined nondiffracting wave with a deflection angle. Based on the geometric optics, the refractive index distribution of the surface wave lens is derived. A square metal ring-shaped metasurface cell is used for realizing small refractive index whilst two opposite E-shaped metal patches are used to form the meta-cell with large refractive index. By adjusting the size of meta-cells, the desired refractive index distribution is obtained after optimization. Measured results show that the inclined nondiffractive surface wave can be achieved with the maximum propagation distance of 99.72 mm at the tilted angle of 26.8°, which are consistent with the full-wave simulation and numerical calculation results. The proposed meta-lens achieves compact size, large titled angle, and long nondiffraction propagation distance, therefore could be well utilized in surface wave communication and nondestructive detection of surface defects.

Original languageEnglish
Pages (from-to)2523-2529
Number of pages7
JournalMicrowave and Optical Technology Letters
Issue number9
Early online date28 Apr 2023
Publication statusPublished - Sept 2023


  • asymmetrical gradient index
  • meta-lens
  • nondiffraction wave deflection
  • surface wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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