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- Title
Spectroscopic scanning near-field optical microscopy with a free electron laser: CH[sub 2] bond imaging in diamond films.
- Authors
Cricenti, A.; Generosi, R.; Luce, M.; Perfetti, P.; Margaritondo, G.; Talley, D.; Sanghera, J. S.; Aggarwal, I. D.; Gilligan, J. M.; Tolk, N. H.
- Abstract
Hydrogen chemistry in thin films and biological systems is one of the most difficult experimental problems in today's science and technology. We successfully tested a novel solution, based on the spectroscopic version of scanning near-field optical microscopy (SNOM). The tunable infrared radiation of the Vanderbilt free electron laser enabled us to reveal clearly hydrogen-decorated grain boundaries on nominally hydrogen-free diamond films. The images were obtained by SNOM detection of reflected 3.5 µm photons, corresponding to the C-H stretch absorption, and reached a lateral resolution of 0.2 µm, well below the λ/2 (λ = wavelength) limit of classical microscopy.
- Subjects
HYDROGEN bonding; DIAMOND thin films; NEAR-field microscopy
- Publication
Journal of Microscopy, 2001, Vol 202, Issue 2, p446
- ISSN
0022-2720
- Publication type
Article
- DOI
10.1046/j.1365-2818.2001.00874.x