title: Electroluminescence from graphene excited by electron tunneling.
abstract: We use low-energy electron tunneling to excite electroluminescence in single layer graphene. Electrons are injected locally using a scanning tunneling microscope and the luminescence is analyzed using a wide-angle optical imaging system. The luminescence can be switched on and off by inverting the tip-sample bias voltage. The observed luminescence is explained in terms of a hot luminescence mechanism.
authors.affiliation: Institute of Optics, University of Rochester, Rochester, NY 14627, USA.
authors.forename: Ryan
authors.initials: R
authors.lastname: Beams
authors.forename: Palash
authors.initials: P
authors.lastname: Bharadwaj
authors.forename: Lukas
authors.initials: L
authors.lastname: Novotny