Graphene-based terahertz waveguide modulators

Andrea Locatelli, Graham E. Town, Costantino De Angelis

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


We report two proof-of-principle designs of silicon terahertz (THz) modulators based on guiding structures wherein graphene is introduced to actively control the properties of the waveguides, thus tuning their transmissivity. Using well-established models to characterize the electromagnetic parameters of electrically-doped graphene, we estimate the theoretical performance of the proposed structures, in particular the required switching voltage and the achievable modulation depth. These results predict considerably improved performance with respect to the state-of-the-art of graphene THz modulators, together with reduced size and larger THz bandwidth.

Original languageEnglish
Pages (from-to)351-357
Number of pages7
JournalIEEE Transactions on Terahertz Science and Technology
Issue number3
Publication statusPublished - 1 May 2015


  • and guided structures
  • arrays
  • Electro-optic modulators
  • graphene
  • THz antennas
  • THz devices and components
  • THz modeling and analysis techniques


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