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Optical near-field probe with embedded gallium scattering center

Applied Physics Letters, ISSN: 0003-6951, Vol: 94, Issue: 25
2009
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An optical near-field probe is proposed in which gallium is embedded into the tip of a tapered optical glass fiber to form a scattering center. Gallium is embedded by implantation during the process of probe sharpening by a raster-scanned focused ion beam. Using quasielectrostatic approximation, it is predicted that the presence of gallium should improve the scattering efficiency by an order of magnitude in comparison with a probe without gallium implantation. Imaging of a polished waveguide with different probes shows that Ga implantation can improve the efficiency by 37 times. © 2009 American Institute of Physics.

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