TITLE

Three dimensional microstructuring of biopolymers by femtosecond laser irradiation

AUTHOR(S)
Oujja, M.; Pérez, S.; Fadeeva, E.; Koch, J.; Chichkov, B. N.; Castillejo, M.
PUB. DATE
December 2009
SOURCE
Applied Physics Letters;12/28/2009, Vol. 95 Issue 26, p263703
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A sequence of single femtosecond pulses is used to create a pattern of laser affected spots at increasing depths below the surface of transparent biopolymer samples. Materials with different water contents and mechanical strengths, gelatine, chitosan, synthetic polyvinyl pyrrolidone, and biopolymer-polymer blends, are irradiated near the edge of the sample with an amplified Titanium:Sapphire laser (800 nm) delivering 30 fs pulses through a 0.45 numerical aperture objective with energies of 100–3000 nJ. The micrometric modified region is observed by optical microscopy perpendicularly to irradiation. Self-focusing and optical aberration are major factors controlling morphology and size of the created spots.
ACCESSION #
47244417

 

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