Simulation and lithographic fabrication of a triple band terahertz metamaterial absorber coated on flexible polyethylene terephthalate substrate


Abdulkarim Y. I., Xiao M., Awl H. N., Muhammadsharif F. F., Lang T., Saeed S. R., ...Daha Fazla

OPTICAL MATERIALS EXPRESS, cilt.12, sa.1, ss.338-359, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 1
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1364/ome.447855
  • Dergi Adı: OPTICAL MATERIALS EXPRESS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, Directory of Open Access Journals
  • Sayfa Sayıları: ss.338-359
  • Yozgat Bozok Üniversitesi Adresli: Evet

Özet

A triple band metamaterial absorber in the terahertz range, incorporating a three closed circle ring resonator, was designed and fabricated on flexible polyethylene terephthalate "PET" substrate. The proposed design was investigated theoretically and experimentally. Computer simulation technology "CST" was used to study the designed structure, while lithography technique was used to fabricate the absorber and terahertz time-domain spectroscopy was utilized to measure the reflectivity. Results showed the presence of three intensive peaks at the resonance frequencies of '0.43, 0.61, and 0.88 THz', which correspond to the absorptivity of 98%, 91%, and 98%, respectively. The sensitivity of the three peaks was found to be '70.5, 133, and 149.5 GHz/RIU', respectively. The parametric studies and field distributions were analysed. Furthermore, the proposed design exhibited polarization insensitivity for both transverse electric "TE" and transverse magnetic "TM" modes from 00 to 900. It was concluded that the proposed design can be specifically viable for some important applications such as 'THz' images, filtering, biological sensing, and optical communications.