title: Spectroscopic scanning near-field optical microscopy with a free electron laser: CH2 bond imaging in diamond films.
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 microm photons, corresponding to the C-H stretch absorption, and reached a lateral resolution of 0.2 microm, well below the lambda/2 (lambda = wavelength) limit of classical microscopy.
authors: Istituto di Stuttura della Materia, via Fosso del Cavaliere 100, 00133 Roma, Italy.
authors: A
authors: A
authors: Cricenti
authors: R
authors: R
authors: Generosi
authors: M
authors: M
authors: Luce
authors: P
authors: P
authors: Perfetti
authors: G
authors: G
authors: Margaritondo
authors: D
authors: D
authors: Talley
authors: J S
authors: JS
authors: Sanghera
authors: I D
authors: ID
authors: Aggarwal
authors: J M
authors: JM
authors: Gilligan
authors: N H
authors: NH
authors: Tolk