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The effects of probe boundary conditions and propagation on nano‐Raman spectroscopy
Author(s) -
Hallen H. D.,
Ayars E. J.,
Jahncke C. L.
Publication year - 2003
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.2003.01138.x
Subject(s) - raman spectroscopy , electric field , reflection (computer programming) , coherent anti stokes raman spectroscopy , near and far field , materials science , molecular physics , optics , field (mathematics) , raman scattering , analytical chemistry (journal) , chemistry , atomic physics , physics , mathematics , chromatography , quantum mechanics , computer science , pure mathematics , programming language
Summary Raman spectra obtained in the near‐field, with collection of the Raman‐shifted light in reflection, show selective enhancement of vibrational modes. We show that the boundary conditions for an electric field near a metal surface affect propagation of the reflected signal and lead to this selection. The enhancement of certain Raman forbidden vibrations is explained by the presence of an electric field gradient near the metal‐apertured fibre probe.