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

Deepak Kallepalli Lakshmi Narayana; Soma Venugopal Rao; Desai Narayana Rao

doi:10.1117/12.975812

4 December 2012 Spectroscopic investigation of fs laser-induced defects in polymer and crystal media

Deepak Kallepalli Lakshmi Narayana, Soma Venugopal Rao, Desai Narayana Rao

Proceedings Volume 8530, Laser-Induced Damage in Optical Materials: 2012; 853004 (2012) https://doi.org/10.1117/12.975812
Event: SPIE Laser Damage, 2012, Boulder, Colorado, United States

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.

Citation Download Citation

Deepak Kallepalli Lakshmi Narayana, Soma Venugopal Rao, and Desai Narayana Rao "Spectroscopic investigation of fs laser-induced defects in polymer and crystal media", Proc. SPIE 8530, Laser-Induced Damage in Optical Materials: 2012, 853004 (4 December 2012); https://doi.org/10.1117/12.975812

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available