ISSN:
1432-0630
Keywords:
42.80
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract In Scanning Near-field Optical Microscopy (SNOM), the case, where the probe is represented by a small metallic sphere, is studied using a microscopic description of the interaction between the probe tip and the surface. A newly established integral expression for the polarizability of a mesoscopic metallic sphere is employed to investigate the conditions for obtaining configurational resonances and to calculate the resolution of the system near the resonance. Both the frequency of light and the probe size are found to be critical for observing the configurational resonances. The width of the resonance peak and the smallest object for which the resonance condition still can be fulfilled (aspects that are relevant to the resolution) are considered for various probe sizes. The influence of the fine structure in the polarizability of the metallic sphere on the resonance distance between two identical spheres is finally discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01575709
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