Shaping the reflection near-field optical probe: finite domain time difference modelling and fabrication using a focused ion beam.
An optical fibre ending in a trihedral tip is proposed as a convenient probe for reflection near-field optical microscopy in emission/collection mode. Its shape is obtained by ion milling. A first example of manufacturing and numerical models using the bi-dimensional FDTD method is presented. It confirms the strong influence of the facet angle on the intensity reflected by the probe, which is predicted by a rough analysis. This method can help us to optimize the 'reflection probe' by reducing this offset signal.
Spajer
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Laboratoire d'Optique P.M. Duffieux, UMR 6603 CNRS, Institut des Microtechniques de Franche-Comté FR 67, Université de Franche-Comté, 25030 Besançon cedex, France. mspajer@univ-comte.fr
Parent
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Bainier
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Charraut
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