title: Thirty Gigahertz Optoelectronic Mixing in Chemical Vapor Deposited Graphene.
abstract: The remarkable properties of graphene, such as broadband optical absorption, high carrier mobility, and short photogenerated carrier lifetime, are particularly attractive for high-frequency optoelectronic devices operating at 1.55 μm telecom wavelength. Moreover, the possibility to transfer graphene on a silicon substrate using a complementary metal-oxide-semiconductor-compatible process opens the ability to integrate electronics and optics on a single cost-effective chip. Here, we report an optoelectronic mixer based on chemical vapor-deposited graphene transferred on an oxidized silicon substrate. Our device consists in a coplanar waveguide that integrates a graphene channel, passivated with an atomic layer-deposited Al2O3 film. With this new structure, 30 GHz optoelectronic mixing in commercially available graphene is demonstrated for the first time. In particular, using a 30 GHz intensity-modulated optical signal and a 29.9 GHz electrical signal, we show frequency downconversion to 100 MHz. These results open promising perspectives in the domain of optoelectronics for radar and radio-communication systems.
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Alberto
authors.initials: A
authors.lastname: Montanaro
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Sana
authors.initials: S
authors.lastname: Mzali
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Mazellier
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Odile
authors.initials: O
authors.lastname: Bezencenet
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Larat
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Stephanie
authors.initials: S
authors.lastname: Molin
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Loïc
authors.initials: L
authors.lastname: Morvan
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Legagneux
authors.affiliation: Thales Research and Technology , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Daniel
authors.initials: D
authors.lastname: Dolfi
authors.affiliation: Unité Mixte de Physique CNRS/Thales , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Bruno
authors.initials: B
authors.lastname: Dlubak
authors.affiliation: Unité Mixte de Physique CNRS/Thales , 1, Avenue Augustin Fresnel, 91767 Palaiseau, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Seneor
authors.affiliation: Department of Engineering, University of Cambridge , Cambridge CB21PZ, United Kingdom.
authors.forename: Marie-Blandine
authors.initials: MB
authors.lastname: Martin
authors.affiliation: Department of Engineering, University of Cambridge , Cambridge CB21PZ, United Kingdom.
authors.forename: Stephan
authors.initials: S
authors.lastname: Hofmann
authors.affiliation: Department of Engineering, University of Cambridge , Cambridge CB21PZ, United Kingdom.
authors.forename: John
authors.initials: J
authors.lastname: Robertson
authors.affiliation: Graphenea S.A. , Tolosa Hiribidea, 76 E-20018 Donostia, Spain.
authors.forename: Alba
authors.initials: A
authors.lastname: Centeno
authors.affiliation: Graphenea S.A. , Tolosa Hiribidea, 76 E-20018 Donostia, Spain.
authors.forename: Amaia
authors.initials: A
authors.lastname: Zurutuza
keywords: Graphene; electronics; graphene devices; graphene optoelectronics; optoelectronic mixer; optoelectronics; signal processing