Patterning the tips of optical fibers with metallic nanostructures using nanoskiving |
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Authors: | Lipomi Darren J Martinez Ramses V Kats Mikhail A Kang Sung H Kim Philseok Aizenberg Joanna Capasso Federico Whitesides George M |
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Affiliation: | Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA. |
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Abstract: | Convenient and inexpensive methods to pattern the facets of optical fibers with metallic nanostructures would enable many applications. This communication reports a method to generate and transfer arrays of metallic nanostructures to the cleaved facets of optical fibers. The process relies on nanoskiving, in which an ultramicrotome, equipped with a diamond knife, sections epoxy nanostructures coated with thin metallic films and embedded in a block of epoxy. Sectioning produces arrays of nanostructures embedded in thin epoxy slabs, which can be transferred manually to the tips of optical fibers at a rate of approximately 2 min(-1), with 88% yield. Etching the epoxy matrices leaves arrays of nanostructures supported directly by the facets of the optical fibers. Examples of structures transferred include gold crescents, rings, high-aspect-ratio concentric cylinders, and gratings of parallel nanowires. |
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