Publications Scientifiques

[ Article ] Optical properties of single silver triangular nanoprism

Date de soumission: 11-01-2017
Année de Publication: 2012
Entité/Laboratoire Laboratoire de Physique du Rayonnement (LPR)
Document type : Article
Discipline(s) : Physique
Titre Optical properties of single silver triangular nanoprism
Journal: Physica Scripta
Catégorie Journal: Internationale
Impact factor: 1.19
Volume Journal: 86
DOI: 10.1088/0031-8949/86/05/055702
Resume The ability to provide large electric field enhancements renders triangular nanoprisms and branched nanoparticles very attractive for applications in surface-enhanced Raman spectroscopy (SERS). Theoretical studies on the optical properties of triangular prisms in a water solution are presented in this paper to determine how structural modifications and incident field polarization affect the extinction spectrum and enhanced local electric fields (E-field) around particles in the wavelength range of 300–1000 nm. The near-field properties, such as the E-field close to the particle, determine the electromagnetic enhancements in SERS. The optical response of a triangular nanoprism can be fully characterized using three different orientations of the incident field polarization. The orientations where the polarization vector is parallel to the triangular cross section are the most important for the overall extinction, rather than those where the polarization vector is perpendicular to the plane. The extinction spectrum presents three distinct localized surface plasmon resonances (LSPRs) for a silver triangular nanoprism. These are assigned as in-plane dipolar and quadrupolar plasmon excitations using electrodynamic modeling based on the finite difference time domain. The dipole resonance is found to be very intense, and its peak wavelength is extremely sensitive to the thickness and edge length of the nanoprism. In contrast, the intensity of the quadrupole resonances is much weaker relative to the dipole resonance. The distribution of the local field around the particle at specified wavelengths, showing the values of the peak field, is presented. All the LSPRs are clearly resolved in the visible. The experimental data are used for comparison. These new spectral features are very promising in the field of nano-optics and for bio-sensing applications.
Mots clés nanoprism, surface plasmon, SERS
Pages 1 - 7
Fichier (PDF)

Publications par entité

  • Centre de Formation et de Recherche en matière de Population (CEFORP) (0)
  • Centre Interfacultaire de Formation et de Recherche en Environnement pour le Développement Durable (CIFRED) (0)
  • Chaire Internationale en Physique Mathématique et Applications (CIPMA-Chaire UNESCO) (0)
  • Ecole Doctorale Pluridisciplinaire <<Espaces, Culture et Développement>> (0)
  • Ecole Nationale d'Administration et de Magistrature (ENAM) (0)
  • Ecole Nationle d'Economie Appliquée et de Management (0)
  • Ecole Normale Supérieure (0)
  • Ecole Polytechnique d'Abomey-Calavi (EPAC) (0)
  • Faculté de droit et de Science Politique (FADESP) (0)
  • Faculté des Lettres et Sciences Humaines (FLASH) (0)
  • Faculté des Lettres, Langues, Arts et Communications (FLLAC) (0)
  • Faculté des Sciences Agronomiques (0)
  • Faculté des Sciences de la Santé (FSS) (0)
  • Faculté des Sciences Economiques et de Gestion (FASEG) (0)
  • Faculté des Sciences et Techniques (FAST) (0)
  • Faculté des Sciences Humaines et Sociales (FASHS) (0)
  • Institut de Formation et de Recherche en Informatique (IFRI) (0)
  • Institut de Géographie de l'Aménagement du territoire et de l'Environnement (IGATE) (0)
  • Institut de Mathématiques et de Sciences Physiques (IMSP) (0)
  • Institut National de l'Eau (INE) (0)
  • Institut National des Métiers d'Art d'Archéologie et de la Culture (INMAAC) (0)
  • Institut National Médico Sanitaire ( INMeS) (0)
  • Institut Régional de Santé Publique (IRSP) (0)

Publications par sexe

  • Femme( 1400 )
  • Homme (