Optical and Electrical Excitation of Hybrid Guided Modes in an Organic Nanofiber–Gold Film System
| Autor: | Jens Christoffers, Eric Le Moal, Elizabeth Boer-Duchemin, Benoît Rogez, Rebecca Horeis, Gérald Dujardin, Katharina Al-Shamery |
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| Přispěvatelé: | Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut für Reine und Angewandte Chemie, Carl Von Ossietzky Universität Oldenburg, Carl von Ossietzky Universitaet Oldenberg, MOSAIC (MOSAIC), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2015 |
| Předmět: |
Waveguide (electromagnetism)
Materials science Photoluminescence Physics::Optics 02 engineering and technology 01 natural sciences law.invention 010309 optics Optics law Dispersion relation 0103 physical sciences Microscopy Physical and Theoretical Chemistry [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] business.industry 021001 nanoscience & nanotechnology Surface plasmon polariton Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Excited state [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Optoelectronics Scanning tunneling microscope 0210 nano-technology business Excitation |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2015, 119 (38), pp.22217-22224. ⟨10.1021/acs.jpcc.5b07053⟩ |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | International audience; We report on the optical and electrical excitation of the modes of a “hybrid” waveguide consisting of a single organic nanofiber on a thin gold film. In the first set of experiments, light is used to excite the photoluminescence of an organic nanofiber on a thin gold film and the resultingemission is analyzed using Fourier-space leakage radiation microscopy. Two guided modes and the dispersion relations of this hybrid waveguide are thus determined. From numerical calculations, both a fundamental and excited mode of mixed photonic−plasmonic character are identified. In a second experiment, a local electrical nanosource of surface plasmon polaritons (SPPs) is coupled to the hybrid waveguide. The SPP nanosource consists of the inelastic electron tunnel current between the tip of a scanning tunneling microscope (STM) and the gold film. We show that the electrically excited SPPs couple to the fundamental mode and that the coupling efficiency is highest when the SPP nanosource is aligned with the nanofiber axis. Moreover, the electrically excited SPPs strongly scatter into out-of-plane light at the nanofiber end. This light from scattered SPPs measured in the substrate is phase shifted by about π with respect to the direct light emission from beneath the STM tip. These experiments lead to a better understanding of the processes that must be optimized in order to exploit such hybridwaveguide structures. |
| Databáze: | OpenAIRE |
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