Graphene Coplanar Capacitor for Electro-Optical Modulation

Author(s)

Bonando, Matheus G. ; Gimenes, Srgio A., Jr. ; Saito, Licia A. M. ; IEEE

• Document type: Journal article
• Source: 2019 SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE (SBFOTON IOPC); v. N/A, p. 4-pg., 2019-01-01.

Abstract

We present an all-fiber graphene electro-absorption optical modulator built onto a side-polished optical fiber in a coplanar capacitor configuration. For a maximum PIMA superstrate thickness of 1 pm and for a gap of 0.1 and 1 mu m it was possible to obtain, respectively, a maximum modulation depth of 7.6 dB/mm and 5.3 dB/mm, a capacitance of 98.4 fF/mm and 63.1 fF/mm and frequencies of 16.2 GHz and 25.3 GHz. The contribution of this work is to demonstrate a low capacitance design with an optimized process fabrication for optical modulation. (AU)

• FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
• Grantee: Antonio Helio de Castro Neto
• Support Opportunities: Research Projects - SPEC Program
• FAPESP's process: 15/11779-4 - Plasmonic and nonlinear effects in graphene coupled to optical waveguides
• Grantee: Christiano José Santiago de Matos
• Support Opportunities: Research Projects - Thematic Grants