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.
DOI
10.1364/ol.44.000195
Publication Date
2019-01-15
Publication Title
Optics Letters
Volume
44
Issue
2
Publisher
Optical Society of America
ISSN
1539-4794
Embargo Period
2024-11-22
First Page
195
Last Page
195
Recommended Citation
Allsop, T., Neal, R., Kundrat, V., Wang, C., & et al. (2019) 'Low-dimensional nano-patterned surface fabricated by direct-write UV-chemically induced geometric inscription technique', Optics Letters, 44(2), pp. 195-195. Optical Society of America: Available at: https://doi.org/10.1364/ol.44.000195
