Over the last two decades scanning near-field optical microscopy (SNOM) has demonstrated its ability to provide optical resolution significantly better than the diffraction limit (<20 nm). The general principle of SNOM relies on the approach of a nanometer-sized object in the optical near-field of a sample to be studied. This nano-object (NO) is usually the extremity of a probe. Regardless of the nature of the observed SNOM signal (inelastic scattering, fluorescence, etc.), the detection of the light is achieved in the far-field regime where the NO acts as a mediator between the optical near-field and the detector. Figure 1 is a schematic illustration of the SNOM principle. © 2007 Springer Science+Business Media, LLC.
CITATION STYLE
Bouhelier, A., & Bachelot, R. (2007). Electromagnetic singularities and resonances in near-field optical probes. In Scanning Probe Microscopy (Vol. 2, pp. 254–279). Springer New York. https://doi.org/10.1007/978-0-387-28668-6_9
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