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Your search keyword '"Benjamin Doppagne"' showing total 4 results
Start Over Author "Benjamin Doppagne" Topic 0103 physical sciences
4 results on '"Benjamin Doppagne"'

1. Electrofluorochromism at the single-molecule level

Author

Michael C. Chong, Guillaume Schull, Fabrice Scheurer, Hervé Bulou, Benjamin Doppagne, Alex Boeglin, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)

Subjects
FOS: Physical sciences, Insulator (electricity), 02 engineering and technology, Electroluminescence, 01 natural sciences, law.invention, Oxidation state, law, Physics - Chemical Physics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Molecule, 010306 general physics, Plasmon, ComputingMilieux_MISCELLANEOUS, Chemical Physics (physics.chem-ph), [PHYS]Physics [physics], Multidisciplinary, Condensed Matter - Mesoscale and Nanoscale Physics, 021001 nanoscience & nanotechnology, Fluorescence, 3. Good health, Radical ion, Chemical physics, Scanning tunneling microscope, 0210 nano-technology
Abstract

The interplay between the oxidation state and the optical properties of molecules plays a key role for applications in displays, sensors or molecular-based memories. The fundamental mechanisms occurring at the level of a single-molecule have been difficult to probe. We used a scanning tunneling microscope (STM) to characterize and control the fluorescence of a single Zn-phthalocyanine radical cation adsorbed on a NaCl-covered Au(111) sample. The neutral and oxidized states of the molecule were identified on the basis of their fluorescence spectra that revealed very different emission energies and vibronic fingerprints. The emission of the charged molecule was controlled by tuning the thickness of the insulator and the plasmons localized at the apex of the STM tip. In addition, sub-nanometric variations of the tip position were used to investigate the charging and electroluminescence mechanisms., 11 pages, 4 figures

Published
2018
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2. Fano Description of Single-Hydrocarbon Fluorescence Excited by a Scanning Tunneling Microscope

Author

Jörg Kröger, Benjamin Doppagne, Fabrice Scheurer, Guillaume Schull, scheurer, fabrice, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), and Technische Universität Ilmenau (TU )

Subjects
Materials science, polyaromatic hydrocarbon, Exciton, FOS: Physical sciences, Bioengineering, 02 engineering and technology, 01 natural sciences, Molecular physics, law.invention, [PHYS.PHYS.PHYS-CHEM-PH] Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Fano, Physics::Atomic and Molecular Clusters, General Materials Science, Physics::Chemical Physics, 010306 general physics, STM-induced luminesence, Plasmon, Quantum tunnelling, Condensed Matter - Mesoscale and Nanoscale Physics, Mechanical Engineering, single-molecule fluorescence, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Single-molecule experiment, 3. Good health, Excited state, Light emission, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Scanning tunneling microscope, 0210 nano-technology, Luminescence
Abstract

The detection of fluorescence with submolecular resolution enables the exploration of spatially varying photon yields and vibronic properties at the single-molecule level. By placing individual polycyclic aromatic hydrocarbon molecules into the plasmon cavity formed by the tip of a scanning tunneling microscope and a NaCl-covered Ag(111) surface, molecular light emission spectra are obtained that unravel vibrational progression. In addition, light spectra unveil a signature of the molecule even when the tunneling current is injected well separated from the molecular emitter. This signature exhibits a distance-dependent Fano profile that reflects the subtle interplay between inelastic tunneling electrons, the molecular exciton and localized plasmons in at-distance as well as on-molecule fluorescence. The presented findings open the path to luminescence of a different class of molecules than investigated before and contribute to the understanding of single-molecule luminescence at surfaces in a unified picture., Comment: 24 pages, 4 figures

Published
2018
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3. Ince-gauss based multiple intermodal phase-matched third-harmonic generations in a step-index silica optical fiber

Author

Kamel Bencheikh, Patricia Segonds, Corinne Felix, Adrien Borne, Juan Ariel Levenson, Tomotaka Katsura, Benjamin Doppagne, Benoît Boulanger, Optique et Matériaux (OPTIMA ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institute for Study of the Earth's Interior, Okayama University, Institute for Study of the Earth's Interior, Optique et microscopies (POM), Laboratoire de photonique et de nanostructures (LPN), and Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Mode volume, Optical fiber, business.industry, Single-mode optical fiber, Phase (waves), Physics::Optics, Polarization-maintaining optical fiber, 01 natural sciences, Graded-index fiber, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, 010309 optics, Core (optical fiber), Optics, law, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Dispersion-shifted fiber, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, 010306 general physics, business, ComputingMilieux_MISCELLANEOUS
Abstract

Several third-harmonic generation processes were performed in a single step-index germanium-doped silica optical fiber under intermodal phase-matching conditions. The nanosecond fundamental beam range between 1400 and 1600 nm. The transverse distributions of the energy were successfully modeled in the form of Ince-Gauss modes, pointing out some ellipticity of fiber core. From these experiments and theoretical calculations, we discuss the implementation of frequency degenerated triple photon generation that shares the same phase-matching condition as third-harmonic generation, which is its reverse process.

Published
2016
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4. Vibronic Spectroscopy with Submolecular Resolution from STM-Induced Electroluminescence

Author

Fabrice Scheurer, Hervé Bulou, Alex Boeglin, Stéphane Berciaud, Michelangelo Romeo, Etienne Lorchat, Benjamin Doppagne, Michael C. Chong, Guillaume Schull, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), univOAK, Archive ouverte, Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.MATE] Chemical Sciences/Material chemistry, Materials science, Resolution (electron density), General Physics and Astronomy, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, Electroluminescence, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 01 natural sciences, Fluorescence, 3. Good health, law.invention, law, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Vibronic spectroscopy, Molecule, Scanning tunneling microscope, Atomic physics, Physics::Chemical Physics, 010306 general physics, 0210 nano-technology
Abstract

A scanning tunneling microscope is used to generate the electroluminescence of phthalocyanine molecules deposited on NaCl/Ag(111). Photon spectra reveal an intense emission line at approximate to 1.9 eV that corresponds to the fluorescence of the molecules, and a series of weaker redshifted lines. Based on a comparison with Raman spectra acquired on macroscopic molecular crystals, these spectroscopic features can be associated with the vibrational modes of the molecules and provide a detailed chemical fingerprint of the probed species. Maps of the vibronic features reveal submolecularly resolved structures whose patterns are related to the symmetry of the probed vibrational modes.

Published
2017
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