Journal
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
Volume 5, Issue 3, Pages 351-357Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTHZ.2015.2416067
Keywords
Electro-optic modulators; graphene; THz antennas; arrays; and guided structures; THz devices and components; THz modeling and analysis techniques
Funding
- EU Graphene Flagship initiative under Project GRAPHATAR (GRAphene PHotonics Applications for Transmitters And Receivers)
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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.
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