Frontiers in Physics (May 2023)

Graphene-coated D-shaped terahertz fiber modulator

  • Shaona Wang,
  • Mengya Su,
  • Longhuang Tang,
  • Xianguo Li,
  • Xiuyan Li,
  • Hua Bai,
  • Pingjuan Niu,
  • Jia Shi,
  • Jia Shi,
  • Jianquan Yao

DOI
https://doi.org/10.3389/fphy.2023.1202839
Journal volume & issue
Vol. 11

Abstract

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A terahertz (THz) fiber is of interest due to low loss and easy beam shaping. Graphene plays an important role in modulating the optical signal. In this paper, a graphene-coated D-shaped THz fiber modulator is proposed. The performance of the proposed modulator is investigated by the finite element method. The inference of geometric parameters of the structure on the proposed modulator is also analyzed, and an optimal structure is obtained. Simulation results show that the confinement loss and the full width at half-maximum (FWHM) can be tuned by adjusting the Fermi level of graphene. The proposed THz fiber modulator shows potential in future THz fiber communications.

Keywords