title: Photothermoelectric and photoelectric contributions to light detection in metal-graphene-metal photodetectors.
abstract: Graphene's high mobility and Fermi velocity, combined with its constant light absorption in the visible to far-infrared range, make it an ideal material to fabricate high-speed and ultrabroadband photodetectors. However, the precise mechanism of photodetection is still debated. Here, we report wavelength and polarization-dependent measurements of metal-graphene-metal photodetectors. This allows us to quantify and control the relative contributions of both photothermo- and photoelectric effects, both adding to the overall photoresponse. This paves the way for a more efficient photodetector design for ultrafast operating speeds.
authors.affiliation: Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom.
authors.forename: T J
authors.initials: TJ
authors.lastname: Echtermeyer
authors.forename: P S
authors.initials: PS
authors.lastname: Nene
authors.forename: M
authors.initials: M
authors.lastname: Trushin
authors.forename: R V
authors.initials: RV
authors.lastname: Gorbachev
authors.forename: A L
authors.initials: AL
authors.lastname: Eiden
authors.forename: S
authors.initials: S
authors.lastname: Milana
authors.forename: Z
authors.initials: Z
authors.lastname: Sun
authors.forename: J
authors.initials: J
authors.lastname: Schliemann
authors.forename: E
authors.initials: E
authors.lastname: Lidorikis
authors.forename: K S
authors.initials: KS
authors.lastname: Novoselov
authors.forename: A C
authors.initials: AC
authors.lastname: Ferrari