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Observation of O₂ inside voids formed in GeO₂ glass by tightly-focused fs-laser pulses

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


Unusual generation of molecular oxygen confined in a void inside the bulk of GeO₂ 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 O₂ formation and...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Optical Materials Express
DOI: 10.1364/OME.1.001150


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