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.
@article{arxiv.1511.02791,
title = {30 GHz optoelectronic mixing in CVD graphene},
author = {A. Montanaro and S. Mzali and J. -P. Mazellier and O. Bezencenet and C. Larat and S. Molin and P. Legagneux and D. Dolfi and B. Dlubak and P. Seneor and M. -B. Martin and S. Hofmann and J. Robertson and A. Centano and A. Zurutuza},
journal= {arXiv preprint arXiv:1511.02791},
year = {2015}
}