Variable optical attenuator and modulator based on a graphene plasmonic gap waveguide

Feng Chao Ni, Ze Tao Xie, Qi Chang Ma, Jin Tao, Lin Wu, Changyuan Yu, Xu Guang Huang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


Variable optical attenuation and optical modulation are essential operations in integrated photonic circuits. A new graphene plasmonic gap waveguide structure, which possesses the functions of variable optical attenuator and modulator, is proposed and numerically investigated. The propagation and attenuation modes of the structure can be realized by tuning the gate-voltage. The result shows that it can achieve great modulation depth per micrometer and the working frequency range of 8 THz or more for the variable optical attenuator and the modulator. It also has the advantages of high tolerance, large attenuation range/ modulation depth, wide bandwidth and high integration without crosstalk, which would be promising for high integrated optical circuits.

Original languageEnglish
Pages (from-to)251-256
Number of pages6
JournalOptics Communications
Publication statusPublished - 1 Nov 2018


  • Graphene
  • Integrated optics devices
  • Surface plasmons
  • Waveguide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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