title: Sub-nanosecond light-pulse generation with waveguide-coupled carbon nanotube transducers.
abstract: Carbon nanotubes (CNTs) have recently been integrated into optical waveguides and operated as electrically-driven light emitters under constant electrical bias. Such devices are of interest for the conversion of fast electrical signals into optical ones within a nanophotonic circuit. Here, we demonstrate that waveguide-integrated single-walled CNTs are promising high-speed transducers for light-pulse generation in the gigahertz range. Using a scalable fabrication approach we realize hybrid CNT-based nanophotonic devices, which generate optical pulse trains in the range from 200 kHz to 2 GHz with decay times below 80 ps. Our results illustrate the potential of CNTs for hybrid optoelectronic systems and nanoscale on-chip light sources.
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.|Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt 64287, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Pyatkov
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Khasminskaya
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.|Department of Physics, Moscow State Pedagogical University, Moscow 119992, Russia.
authors.forename: Vadim
authors.initials: V
authors.lastname: Kovalyuk
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.
authors.forename: Frank
authors.initials: F
authors.lastname: Hennrich
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.|Institute of Physical Chemistry, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.
authors.forename: Manfred M
authors.initials: MM
authors.lastname: Kappes
authors.affiliation: Department of Physics, Moscow State Pedagogical University, Moscow 119992, Russia.|National Research University Higher School of Economics, Moscow 101000, Russia.
authors.forename: Gregory N
authors.initials: GN
authors.lastname: Goltsman
authors.affiliation: Institute of Physics, University of Münster, Münster 48149, Germany.
authors.forename: Wolfram H P
authors.initials: WHP
authors.lastname: Pernice
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology, Karlsruhe 76021, Germany.|Department of Materials and Earth Sciences, Technische Universität Darmstadt, Darmstadt 64287, Germany.
authors.forename: Ralph
authors.initials: R
authors.lastname: Krupke
keywords: carbon nanotubes; infrared; integrated optics devices; nanomaterials