Electrical switching of devices based on graphene for optical modulation

• Grant number: 17/07557-1
• Support Opportunities: Scholarships in Brazil - Master
• Start date: November 01, 2017
• End date: June 30, 2019
• Field of knowledge: Engineering - Electrical Engineering - Telecommunications
• Principal Investigator: Lúcia Akemi Miyazato Saito
• Grantee: Maria Cecília Schineider Araújo
• Host Institution: Instituto Mackenzie de Pesquisas em Grafeno e Nanotecnologias (Mackgraphe). Universidade Presbiteriana Mackenzie (UPM). Instituto Presbiteriano Mackenzie. São Paulo , SP, Brazil
• Associated research grant: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration, AP.SPEC

Abstract

The objective of this project is to develop a process of manufacture and characterization of graphene-based electro-optical modulator with the structure of a FET (Field Effect Transistor) on a waveguide, where electric gate voltage (Vg) is applied on the device in order to modulate the optical signal. The optical modulator will consist of a graphene CVD (Chemical Vapor Deposition) layer transferred to the polished side of an optical fiber, which called D-shaped optical fiber and covered by ionic liquid with the function of dielectric and gate contact. This sample is fixed on a silica substrate between two metallic contacts, which will have the function of source and drain. The performance of the electro-optical graphene modulator is going to be evaluate by considering three important parameters: frequency modulation (f), the gate voltage (Vg), and the modulation depth (Pmod), whose is calculated by the absorption difference between the two propagation modes, TE and TM. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BONANDO, MATHEUS G.; ARAUJO, MARIA C. S.; SAITO, LUCIA A. M.; IEEE. All-fiber graphene electro-optic modulators with different dielectric materials. 2018 SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE (SBFOTON IOPC), v. N/A, p. 4-pg., 2018-01-01. (12/50259-8, 15/11779-4, 17/07557-1)