Graphene-based electro-optical modulators integrated into polymer waveguide with three dielectric materials proposals
Tipo
Artigo de evento
Data de publicação
2019
Periódico
2018 SBFoton International Optics and Photonics Conference, SBFoton IOPC 2018
Citações (Scopus)
1
Autores
Camacho W.A.
Thoroh De Souza E.A.
Saito L.A.M.
Thoroh De Souza E.A.
Saito L.A.M.
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Resumo
© 2018 IEEE. This work presents an analysis of electro-optical modulators integrated into polymer waveguides, which operates over electro-Absorption effect through graphene. This study focus in three different dielectric materials for the capacitive structure in the device such as silicon nitride, Si 3 N 4 , hafnium oxide, HfO 2 and boron nitride, hBN. By varying the thickness of the dielectric material, it was possible to improve the extinction ratio, modulation frequency and reduce the switching voltages requirements. By considering a bottom cladding, it was possible to increase the light interaction with the graphene and obtain higher modulation frequencies. In the case of the device with HfO 2 , it was possible to obtain the highest extinction rate of 0.117 dB/μm with a dielectric thickness of 50 nm. For the model with the hBN thickness layer of 50 nm, the maximum operation frequency was 35 GHz, considering a device length of 27 μm. The condition with the minimum voltage requirements was obtained with HfO 2 , which the value switching was between 2.5 and 5 V. Although the results with Si 3 N 4 are not the best, it is a good option when the device project try to match all the design requirements.
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Assuntos Scopus
Capacitive structure , Dielectric thickness , Electro-absorption effects , Electrooptical modulators , Modulation frequencies , Operation frequency , Polymer waveguides , Voltage requirement