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

Lakshmi N. Kallepalli; Narayana Rao Desai; Soma Venugopal Rao

doi:10.1117/1.OE.51.7.073402

6 July 2012 Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices

Lakshmi N. Kallepalli, Narayana Rao Desai, Soma Venugopal Rao

Author Affiliations +

Optical Engineering, Vol. 51, Issue 7, 073402 (July 2012). https://doi.org/10.1117/1.OE.51.7.073402

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.

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Lakshmi N. Kallepalli, Narayana Rao Desai, and Soma Venugopal Rao "Femtosecond-laser direct writing in polymers and potential applications in microfluidics and memory devices," Optical Engineering 51(7), 073402 (6 July 2012). https://doi.org/10.1117/1.OE.51.7.073402

Published: 6 July 2012

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