30 GHz optoelectronic mixing in CVD graphene
A. Montanaro, S. Mzali, J.-P. Mazellier, O. Bezencenet, C. Larat, S., Molin, P. Legagneux, D. Dolfi, B. Dlubak, P. Seneor, M.-B. Martin, S., Hofmann, J. Robertson, A. Centano, A. Zurutuza
TL;DR
This paper demonstrates 30 GHz optoelectronic mixing using CVD graphene integrated into a coplanar waveguide, enabling frequency downconversion for advanced radar and communication applications.
Contribution
First demonstration of 30 GHz optoelectronic mixing in commercially-available CVD graphene with a novel device structure.
Findings
Achieved frequency downconversion from 30 GHz to 100 MHz
Used a graphene channel passivated with Al2O3
Demonstrated mixing with 29.9 GHz electrical signal
Abstract
We report an optoelectronic mixer based on chemical vapour-deposited graphene. 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.
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Taxonomy
TopicsGraphene research and applications · Photonic and Optical Devices · Silicon Nanostructures and Photoluminescence