Light depolarization induced by metallic tips in apertureless near-field optical microscopy and tip-enhanced Raman spectroscopy (Articolo in rivista)

Type
Label
  • Light depolarization induced by metallic tips in apertureless near-field optical microscopy and tip-enhanced Raman spectroscopy (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Gucciardi, PG; Lopes, M; Deturche, R; Julien, C; Barchiesi, D; de la Chapelle, ML (2008)
    Light depolarization induced by metallic tips in apertureless near-field optical microscopy and tip-enhanced Raman spectroscopy
    in Nanotechnology (Bristol. Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gucciardi, PG; Lopes, M; Deturche, R; Julien, C; Barchiesi, D; de la Chapelle, ML (literal)
Pagina inizio
  • 215702 (literal)
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  • 19 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Ist Proc Chim Fis, CNR, Sez Messina, I-98158 Messina, Italy Univ Technol Troyes, Lab Nanotechnol & Instrument Opt, CNRS, Inst Charles Delaunay,FRE 2848, F-10010 Troyes, France (literal)
Titolo
  • Light depolarization induced by metallic tips in apertureless near-field optical microscopy and tip-enhanced Raman spectroscopy (literal)
Abstract
  • We have investigated the depolarization effects of light scattered by sharp tips used for apertureless near-field optical microscopy. Dielectric and metal coated tips have been investigated and depolarization factors between 5 and 30% have been measured, changing as a function of the incident light polarization and of the tip shape. The experimental results are in good agreement with theoretical calculations performed by the finite element method, giving a near-field depolarization factor close to 10%. The effect of depolarization has been investigated in polarized tip-enhanced Raman spectroscopy (TERS) experiments; the depolarization gives rise to forbidden Raman modes in Si crystals. (literal)
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