title: Narrow-Line Single-Molecule Transducer between Electronic Circuits and Surface Plasmons.
abstract: A molecular wire containing an emitting molecular center is controllably suspended between the plasmonic electrodes of a cryogenic scanning tunneling microscope. Passing current through this circuit generates an ultranarrow-line emission at an energy of ≈1.5  eV which is assigned to the fluorescence of the molecular center. Control over the linewidth is obtained by progressively detaching the emitting unit from the surface. The recorded spectra also reveal several vibronic peaks of low intensities that can be viewed as a fingerprint of the emitter. Surface plasmons localized at the tip-sample interface are shown to play a major role in both excitation and emission of the molecular excitons.
authors: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-Université de Strasbourg), 67034 Strasbourg, France.
authors: Michael C
authors: MC
authors: Chong
authors: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-Université de Strasbourg), 67034 Strasbourg, France.
authors: Gaël
authors: G
authors: Reecht
authors: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-Université de Strasbourg), 67034 Strasbourg, France.
authors: Hervé
authors: H
authors: Bulou
authors: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-Université de Strasbourg), 67034 Strasbourg, France.
authors: Alex
authors: A
authors: Boeglin
authors: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-Université de Strasbourg), 67034 Strasbourg, France.
authors: Fabrice
authors: F
authors: Scheurer
authors: Institut Parisien de Chimie Moléculaire, Chimie des polymères, UMR 8232, CNRS-Université Pierre et Marie Curie, 94200 Ivry sur Seine, France.
authors: Fabrice
authors: F
authors: Mathevet
authors: Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 (CNRS-Université de Strasbourg), 67034 Strasbourg, France.
authors: Guillaume
authors: G
authors: Schull