title: Ultrafast electronic readout of diamond nitrogen-vacancy centres coupled to graphene.
abstract: Non-radiative transfer processes are often regarded as loss channels for an optical emitter because they are inherently difficult to access experimentally. Recently, it has been shown that emitters, such as fluorophores and nitrogen-vacancy centres in diamond, can exhibit a strong non-radiative energy transfer to graphene. So far, the energy of the transferred electronic excitations has been considered to be lost within the electron bath of the graphene. Here we demonstrate that the transferred excitations can be read out by detecting corresponding currents with a picosecond time resolution. We detect electronically the spin of nitrogen-vacancy centres in diamond and control the non-radiative transfer to graphene by electron spin resonance. Our results open the avenue for incorporating nitrogen-vacancy centres into ultrafast electronic circuits and for harvesting non-radiative transfer processes electronically.
authors.affiliation: 1] Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany [2] Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 Munich, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Brenneis
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain.
authors.forename: Louis
authors.initials: L
authors.lastname: Gaudreau
authors.affiliation: Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany.
authors.forename: Max
authors.initials: M
authors.lastname: Seifert
authors.affiliation: Institute of Physics, University of Augsburg, 86135 Augsburg, Germany.
authors.forename: Helmut
authors.initials: H
authors.lastname: Karl
authors.affiliation: Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany.
authors.forename: Martin S
authors.initials: MS
authors.lastname: Brandt
authors.affiliation: 1] Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 Munich, Germany [2] Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany.
authors.forename: Hans
authors.initials: H
authors.lastname: Huebl
authors.affiliation: 1] Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany [2] Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 Munich, Germany.
authors.forename: Jose A
authors.initials: JA
authors.lastname: Garrido
authors.affiliation: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain.
authors.forename: Frank H L
authors.initials: FH
authors.lastname: Koppens
authors.affiliation: 1] Walter Schottky Institut and Physik-Department, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany [2] Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 Munich, Germany.
authors.forename: Alexander W
authors.initials: AW
authors.lastname: Holleitner