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Low-dimensional nano-patterned surface fabricated by direct-write UV-chemically induced geometric inscription technique

AuthorsAllsop, T.; Neal, R.; Kundrat, V.; Wang, C.; Mou, C.; Culverhouse, P.; Ania Castañón, Juan Diego ; Kalli, K.; Webb, D.J.
Issue Date2-Jan-2019
PublisherOptical Society of America
CitationOptics Letters 44: 195-198 (2019)
AbstractWe 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.
Description4 pags., 4 figs.
Publisher version (URL)http://dx.doi.org/10.1364/OL.44.000195
Identifiersdoi: 10.1364/OL.44.000195
issn: 1539-4794
Appears in Collections:(CFMAC-IO) Artículos
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