Graphene-based electro-optical control of the beat length of dielectric couplers

Year: 2014

Authors: Locatelli A., Capobianco A.-D., Nalesso G., Boscolo S., Midrio M., De Angelis C.

Autors Affiliation: Dipartimento di Ingegneria dell\’Informazione, Università degli Studi di Brescia, via Branze 38, 25123 Brescia,Italy; Dipartimento di Ingegneria dell\’Informazione, Università degli Studi di Padova, via Gradenigo 6/b, Padova3 5131,Italy; Dipartimento di Ingegneria Elettrica Gestionale e Meccanica, Università degli Studi di Udine, via delle Scienze 208, Udine 33100, Italy

Abstract: We describe the properties of dielectric couplers wherein tunability is achieved by inserting graphene layers in the region which separates the waveguides. We show that, in spite of the atomic thickness of graphene, the strong dependence of its optical parameters on the bias voltage allows coupling between the waveguides, and then the beat length of the coupler, to be dramatically changed. We also demonstrate that simple analytical models based on classic waveguide theory can be efficiently applied for the analysis of complex graphene-based electro-optical structures. (C) 2014 Elsevier B.V. All rights reserved.


Volume: 318      Pages from: 175  to: 179

KeyWords: Graphene Photonics
DOI: 10.1016/j.optcom.2013.12.067

Citations: 5
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