Planar bowtie nanoarray for THz energy detection

Ahmed M.A. Sabaawi, Charalampos C. Tsimenidis, Bayan S. Sharif

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


In this paper, an investigation is presented into nanogap-based bowtie nanoarrays for THz energy detection, with the aim of optimizing their geometrical parameters utilizing finite-element method (FEM) based simulations. The bowtie elements of the array are connected by feeding lines, which are used to transfer the captured electric field away from the antenna's center to a common feeding gap. The performance of the bowtie nanoarray has been compared with a single bowtie element constructed using the same device area. The obtained results demonstrated that the array outperforms the single element bowtie. Subsequently, a parametric study is carried out on important geometrical parameters of the array to optimize its performance. The results demonstrate that the optimum spacing between array elements is 2.9 μm, whereas the best line width of the feeding lines is 50μnm. Additionally, it has been found that a 25μnm gap offers the highest electric field at resonance. Furthermore, a bowtie nanoarray is designed based on the optimized parameters of the parametric study. Finally, the effects of the incident angle and curvature of the edges of the array elements and feeding lines have also been studied and their impact on the overall performance is presented in this paper.

Original languageBritish English
Article number6584802
Pages (from-to)524-531
Number of pages8
JournalIEEE Transactions on Terahertz Science and Technology
Issue number5
StatePublished - 2013


  • Antenna arrays
  • finite-element method (FEM)
  • nanoantennas
  • THz detection


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