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Proceedings Paper

Spectroscopic investigation of fs laser-induced defects in polymer and crystal media
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Paper Abstract

We investigated formation of defects in four polymers namely Poly (methylmethacrylate) [PMMA], Poly dimethylsiloxane [PDMS], Polystyrene [PS], and Polyvinyl alcohol [PVA] and crystal media such as Lithium Niobate [LiNbO3]. Spectroscopic studies of the femtosecond (fs) laser modified regions were systematically performed after fabricating several gratings and micro-channels. We observed emission from the fs laser modified regions of these polymers when excited at different wavelengths. Pristine polymers are not paramagnetic, but exhibited paramagnetic behavior upon fs irradiation. LiNbO3 (LNB) crystal has not shown any defect formation upon laser irradiation. Confocal micro-Raman studies were also performed to establish the formation of defects.

Paper Details

Date Published: 4 December 2012
PDF: 16 pages
Proc. SPIE 8530, Laser-Induced Damage in Optical Materials: 2012, 853004 (4 December 2012); doi: 10.1117/12.975812
Show Author Affiliations
Deepak Kallepalli Lakshmi Narayana, Aix Marseille Univ., CNRS, LP3 (France)
Univ. of Hyderabad (India)
Soma Venugopal Rao, Univ. of Hyderabad (India)
Desai Narayana Rao, Univ. of Hyderabad (India)

Published in SPIE Proceedings Vol. 8530:
Laser-Induced Damage in Optical Materials: 2012
Gregory J. Exarhos; Vitaly E. Gruzdev; Joseph A. Menapace; Detlev Ristau; M J Soileau, Editor(s)

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