Time-resolved study of laser-induced breakdown in dielectrics
We present the first femtosecond time-resolved study of the evolution of the laser-excited carrier density with the laser intensity, in various dielectrics of practical interest (SiO2, Al2O3, MgO) both above and below the breakdown threshold. These measurements demonstrate that the high electronic e...
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Published in | Europhysics letters Vol. 56; no. 1; pp. 138 - 144 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Les Ulis
IOP Publishing
01.10.2001
EDP Sciences EDP sciences |
Subjects | |
Online Access | Get full text |
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Summary: | We present the first femtosecond time-resolved study of the evolution of the laser-excited carrier density with the laser intensity, in various dielectrics of practical interest (SiO2, Al2O3, MgO) both above and below the breakdown threshold. These measurements demonstrate that the high electronic excitation responsible for optical breakdown in these solids is produced by multiphoton absorption by valence electrons, for pulses shorter than a few ps. No sign of electronic avalanche has been observed for such short pulses. |
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Bibliography: | publisher-ID:6730 istex:89FFC9897956087C1F805DCCE3B7C3F1FC1AA365 ark:/67375/80W-V8R8XRWQ-Q |
ISSN: | 0295-5075 1286-4854 |
DOI: | 10.1209/epl/i2001-00499-9 |