title: Multifunctional graphene optical modulator and photodetector integrated on silicon waveguides.
abstract: Graphene's unique optoelectronic properties have been exploited for many photonic applications. Here, we demonstrate a single graphene-based device that simultaneously provides efficient optical modulation and photodetection. The graphene device is integrated on a silicon waveguide and is tunable with a graphene gate to achieve a near-infrared photodetection responsivity of 57 mA/W and modulation depth of 64% with GHz bandwidth. Simultaneous modulation of photocurrent and optical transmission has been achieved, which may lead to unprecedented optoelectronic applications.
authors.affiliation: Department of Electrical and Computer Engineering, University of Minnesota , Minneapolis, Minnesota 55455, United States.
authors.forename: Nathan
authors.initials: N
authors.lastname: Youngblood
authors.forename: Yoska
authors.initials: Y
authors.lastname: Anugrah
authors.forename: Rui
authors.initials: R
authors.lastname: Ma
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Koester
authors.forename: Mo
authors.initials: M
authors.lastname: Li