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Title

Observation of O(2) inside voids formed in GeO(2) glass by tightly-focused fs-laser pulses

Author(s)

Bressel, Lena;  de Ligny, Dominique;  Gamaly, Eugene G.;  Rode, Andrei V.;  Juodkazis, Saulius

Abstract

Unusual generation of molecular oxygen confined in a void inside the bulk of GeO(2) glass is observed with the Raman spectroscopy. The voids are formed by single tightly-focussed femtosecond laser pulses, converting a host glass material into a high temperature plasma, which explodes creating a void and inducing unexpected phase transformations. The intensity of the 1556 cm(-1) Raman line, that is a signature of molecular oxygen, increases with pulse energy. The mechanism of O(2) formation and material synthesis in plasma is presented and its relevance to fundamental problems of matter at high-pressure and temperature conditions and subject to geo-physical sciences is discussed.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Optical Materials Express, Vol. 1, no. 6 (Oct 2011), pp. 1150-1157

Publication year

2011

Keyword(s)

Femtosecond laser pulses;  Glass;  Oxygen;  Raman scattering;  Refractive index;  Voids;  Waveguides

Publisher

Optical Society of America

ISSN

2159-3930

Publisher URL

http://dx.doi.org/10.1364/OME.1.001150

Copyright

Copyright © 2011 Optical Society of America. This paper was published in Optical Materials Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OME.1.001150. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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