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|Title:||Low-dimensional nano-patterned surface fabricated by direct-write UV-chemically induced geometric inscription technique||Authors:||Allsop, Thomas P.
Ania-Castanon, J. D.
Webb, David J.
|Keywords:||Laser materials processing;Optical fiber fabrication;Optical fibers;Plasmonics||Category:||Electrical Engineering - Electronic Engineering - Information Engineering||Field:||Engineering and Technology||Issue Date:||15-Jan-2019||Source:||Optics Letters, 2019, vol. 44, no. 2, pp. 195-198||Journal:||Optics letters||Abstract:||We investigate a nano-patterning process which creates reproducible periodic surface topological features that range in size from ∼100 μm to ∼20 μm. Specifically, we have fabricated multi-layered thin films consisting of germanium/silicon strata on a planar substrate, with each layer having nanometers thickness. The material processing exploits focused 244 nm ultra-violet laser light and an opto-mechanical setup typically applied to the inscription of fiber gratings, and is based upon the well-known material compaction interaction of ultra-violet light with germanium oxides. We show this process can be extended to create arrays of metal nano-antennas by adding a metal overlay to the thin film. This results in arrays with dimensions that span nanometer- to centimeter-length scales. Also, each nano-antenna consists of "nano-blocks." Experimental data are presented that show the UV irradiance dosage used to create these metal nanostructures on D-shaped optical fibers has a direct relationship to their transmission spectral characteristics as plasmonic devices.||ISSN:||1539-4794||DOI:||10.1364/OL.44.000195||Rights:||© 2019 Optical Society of America.||Type:||Article|
|Appears in Collections:||Άρθρα/Articles|
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