Influence of Secondary Tip Shape on Illumination-Mode Near-Field Scanning Optical Microscopy Images
Lee J. Richter, C E. Dentinger, Richard R. Cavanagh, Garnett W. Bryant, A Liu, Stephan J. Stranick, C D. Keating, M J. Natan
We report illumination-mode near-field optical microscopy images of individual 80-115 nm diameter Au particles recorded with metal-coated fiber probes. It is found that the images are strongly influenced by the metal-coating thickness. This dependence is consistent with theoretical models which are in good agreement with the experimental images. Probes with thick coatings (~ ) produce images consisting of three extreme, due to a resonance-like polarization of the probe end. Probes with thinner coatings generally produce simpler images. However, in some cases the images contain wave-like structures due to interference between the direct radiation from the tip and propagating tip fields scattered by the particles.
Journal of the Optical Society of America A-Optics Image Science and Vision
, Dentinger, C.
, Cavanagh, R.
, Bryant, G.
, Liu, A.
, Stranick, S.
, Keating, C.
and Natan, M.
Influence of Secondary Tip Shape on Illumination-Mode Near-Field Scanning Optical Microscopy Images, Journal of the Optical Society of America A-Optics Image Science and Vision
(Accessed December 9, 2023)