Graphene-based terahertz waveguide modulators

Year: 2015

Authors: Locatelli A., Town G., De Angelis C.

Autors Affiliation: Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Brescia, Brescia BS, Italy; Department of Engineering, Macquarie University, North Ryde, NSW 2109. Australia

Abstract: 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.


Volume: 5 (3)      Pages from: 351  to: 357

More Information: This work was supported in part by the EU Graphene Flagship initiative under Project GRAPHATAR (GRAphene PHotonics Applications for Transmitters And Receivers).
KeyWords: Electro-optic modulators; graphene; THz antennas; arrays; and guided structures
DOI: 10.1109/TTHZ.2015.2416067

Citations: 27
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