No CrossRef data available.
Article contents
Improvement of near-field fluorescence imaging of bulk materials by metalcoating*
Published online by Cambridge University Press: 15 May 1999
Abstract
By using a simple model based on a linear susceptibility approach and taking into account the dynamic nature of the molecule's electronic structure, the electric field diffracted by the near-field probe is evaluated in the presence or absence of a thin silver layer deposited on the surface of a bulk fluorescent material. This modeling points out that the far-field signal emitted by the molecules situated far from the tip is important in the absence of metal coating and can reduce the near-field detection sensitivity. It shows that surface metal coating enhances the near-field contribution and decreases the far-field one. Cathodoluminescence images obtained on a fluorite (CaF2:Eu) sample confirm the results predicted by modeling.
- Type
- Research Article
- Information
- Copyright
- © EDP Sciences, 1999
Footnotes
This paper was presented at the special Colloquium CFMCP held at Strasbourg-Illkirch the July 1st-3rd, 1998.