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Optical Engineering

Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices
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Paper Abstract

We have investigated femtosecond-laser-induced microstructures (on the surface and within the bulk), gratings, and craters in four different polymers: polymethyl methacrylate, polydimethylsiloxane, polystyrene, and polyvinyl alcohol. The structures were achieved using a Ti:sapphire laser delivering 100-fs pulses at 800 nm with a repetition rate of 1 kHz and a maximum pulse energy of 1 mJ. Local chemical modifications leading to the formation of optical centers and peroxide radicals were studied using ultraviolet-visible absorption and emission, confocal micro-Raman and electron spin resonance spectroscopic techniques. Potential applications of these structures in microfluidics, waveguides, and memory-based devices are demonstrated.

Paper Details

Date Published: 6 July 2012
PDF: 7 pages
Opt. Eng. 51(7) 073402 doi: 10.1117/1.OE.51.7.073402
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Lakshmi N. Kallepalli, l’Univ. de la Méditerranée-Aix-Marseille II (France)
Narayana Rao Desai, Univ. of Hyderabad (India)
Soma Venugopal Rao, Univ. of Hyderabad (India)

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