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Near‐field imaging of organic nanofibres
Author(s) -
VOLKOV V. S.,
BOZHEVOLNYI S. I.,
BORDO V. G.,
RUBAHN H.G.
Publication year - 2004
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 - 10.1111/j.0022-2720.2004.01370.x
Subject(s) - near and far field , excitation , materials science , field (mathematics) , fluorescence , dielectric , near field scanning optical microscope , optoelectronics , optics , local field , ultraviolet , optical microscope , physics , condensed matter physics , scanning electron microscope , composite material , mathematics , quantum mechanics , pure mathematics
Summary The optical near‐field of orientated nanofibres of para‐hexaphenyl was investigated by a combination of localized far‐field ultraviolet excitation and scanning near‐field fluorescence detection. Morphological inhomogeneities of the nanofibres together with selective incoupling into the near‐field probe resulted in a detection sensitivity was dependent on individual nanoaggregates. Strongest near‐field intensity and radiation into the far‐field were observed at the crossing points of nanofibres. The near‐field observation of a distance‐dependent damping of the waveguiding along the nanofibres allowed us to determine the imaginary part of the dielectric function of the nanofibres, in quantitative agreement with far‐field optical data.