期刊
OPTICAL MATERIALS EXPRESS
卷 1, 期 6, 页码 1150-1157出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.1.001150
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资金
- CNRS
- CECOMO
- LLP - Leonardo da Vinci
- Australian Research Council
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 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. (C) 2011 Optical Society of America
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