The validity of reflection-back-to-the-fiber SNOM (scanning near-field optical microscopy) has been unduely questioned by an erratic approach curve that disputed the enhancement of near-field reflectance. It is shown now that only truncated (broken) tips without metal coating do not experience the e
Field-enhanced scanning near-field optical microscopy
β Scribed by Alexandre Bouhelier
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 741 KB
- Volume
- 69
- Category
- Article
- ISSN
- 1059-910X
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β¦ Synopsis
Abstract
This manuscript reviews the principles and recent advances of scanning nearβfield optical microscopy based on tipβinduced field enhancement. These scanning microscopes utilize minute probes to locally enhance an electromagnetic field through a complex interplay between surface plasmon excitation and localization of electric charges by geometrical singularities. The necessary conditions leading to an electromagnetic enhancement will be reviewed, as well as the means to characterize it. A brief account of the theoretical framework will be given, together with applications of the technique ranging from chemical imaging to nanolithography. Microsc. Res. Tech., 2006. Β© 2006 WileyβLiss, Inc.
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