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Fabrication of a pencil-shaped fiber probe for near-field optics by selective chemical etching

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2 Author(s)
Mononobe, S. ; Kanagawa Acad. of Sci. & Technol., Kawasaki, Japan ; Ohtsu, Motoichi

We propose a novel method by chemical etching using hydrofluoric (HF) acid and a buffered HF solution (BHF) to fabricate a pencil-shaped fiber probe for near-field optics. We succeeded in producing such probes with high reproducibility using a dispersion-compensating fiber having the high GeO2 doped core. The method involves tapering of the cladding, then sharpening of the core. The fabricated probe has a conical tip with a cone angle of 20° and an apex diameter of less than 10 nm

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Lightwave Technology, Journal of  (Volume:14 ,  Issue: 10 )