Journal
JOURNAL OF MICROSCOPY
Volume 209, Issue -, Pages 241-248Publisher
WILEY
DOI: 10.1046/j.1365-2818.2003.01139.x
Keywords
Green's dyadic; nanostructures; near-field microscopy; near-field optics; scanning probe microscopy; surface plasmons
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Scanning near-field optical microscopy images of metal nanostructures taken with the tetrahedral tip (T-tip) show a distribution of dark and bright spots at distances in the order of 25-50 nm. The images are interpreted as photonic nanopatterns defined as calculated scanning near-field optical microscopy images using a dipole serving as a light-emitting scanning near-field optical microscopy probe. Changing from a positive to a negative value of the dielectric function of a sample leads to the partition of one spot into several spots in the photonic nanopatterns, indicating the excitation of surface plasmons of a wavelength in the order of 50-100 nm in metal nanostructures.
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