Near-Field Optical Microscopy (NFOM)
Near-field optical microscopy (NFOM) uses a very small light source to beat the diffraction limit of conventional optical microscopy. The sample is placed near the light source so that imaging resolution is comparable to the diameter of the light source.
The near-field light source is made from a glass capillary that is heated with a CO2 laser and pulled to an atomically-sharp tip. The outside of the capillary is coated with silver for reflectivity except for the end of the tip. The near-field source is brought very close to a sample and rastered across it to produce an image.
/chem-ed/imaging/nfom.htm, updated 11/3/96
Copyright © 1996 by Brian M. Tissue, all rights reserved.
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