Self-organized micro-holes on titania based sol-gel films under continuous direct writing with a continuous wave ultraviolet laser

Journal Article · Mon May 27 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4807784· OSTI ID:22162957

Bakhti, S.; Destouches, N.; Gamet, E.; Reynaud, S. ^[1]; Balan, L. ^[2]

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1. University of Lyon, F. 42023 Saint-Etienne (France)
2. Institut de Sciences des Materiaux de Mulhouse, CNRS UMR 7361, Universite de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse (France)

The microstructuring of titania based sol-gel films is investigated by direct writing with a continuous wave ultraviolet laser beam emitting at 244 nm. Depending on the exposure conditions, the films exhibit a volume expansion, a volume shrinkage, a self-shaped delamination, or are damaged. This paper is mainly focused on the regime where spontaneous local delamination occurs, which corresponds to a narrow range of laser irradiances and writing speeds. In this regime, self-organized round-shape micro-holes opened on the substrate are generated.

• OSTI ID: 22162957
• Journal Information: Applied Physics Letters, Vol. 102, Issue 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
CRYSTAL STRUCTURE
DAMAGE
EXPANSION
LASER MATERIALS
LASER RADIATION
MICROSTRUCTURE
RADIANT FLUX DENSITY
SHRINKAGE
SOL-GEL PROCESS
SUBSTRATES
THIN FILMS
TITANIUM OXIDES
ULTRAVIOLET RADIATION