Observation of O2 inside voids formed in Geo2 glass by tightly-focused fs-laser pulses

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

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    41 Citations (Scopus)

    Abstract

    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 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.

    Original languageEnglish
    Pages (from-to)1150-1158
    Number of pages9
    JournalOptical Materials Express
    Volume1
    Issue number6
    DOIs
    Publication statusPublished - 1 Oct 2011

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