Article | REF: P862 V1

Near-field optical microscopy

Author: Daniel VAN LABEKE

Publication date: March 10, 1998

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2. Principle

The theoretical determination of the image of an object in near-field optical microscopy is a problem of diffraction of electromagnetic waves by a system consisting of the object and the probe.

Many different configurations have been tested in near-field optical microscopy. They all use the same operating principle: evanescent waves are transformed into homogeneous waves.

In this section, we present a theo-ric approach. We'll confine ourselves to using a scalar theory in which the vector and polarization properties of light are ignored. But this formalism is sufficient to describe the general principles of near-field optical microscopy.

2.1 Decomposition into plane-wave spectra

Consider a thin object located...

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