Low-dimensional nano-patterned surface fabricated by direct-write UV-chemically induced geometric inscription technique.
Opt Lett
; 44(2): 195-198, 2019 Jan 15.
Article
in En
| MEDLINE
| ID: mdl-30644859
ABSTRACT
We investigate a nano-patterning process which creates reproducible periodic surface topological features that range in size from â¼100 µm to â¼20 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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Opt Lett
Year:
2019
Document type:
Article