Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, Epiciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Filamentation and damage in fused silica induced by tightly focused femtosecond laser pulses

Abstract : We investigate experimentally and numerically the damage tracks induced by tightly focused (NA=0.5) infrared femtosecond laser pulses in the bulk of a fused silica sample. Two types of irreversible damage are observed. The first damage corresponds to a permanent change of refractive index without structural modifications (type I). It appears for input pulse energies beyond 0.1 μJ. It takes the form of a narrow track extending over more than 100 μm at higher input powers. It is attributed to a change of the polarizability of the medium, following a filamentary propagation which generates an electron-hole plasma through optical field ionization. A second type of damage occurs for input pulse energies beyond 0.3 μJ (type II). It takes the form of a pear-shaped structural damage associated with an electron-ion plasma triggered by avalanche. The temporal evolution of plasma absorption is studied by pump-probe experiments. For type I damage, a fast electron-hole recombination is observed. Type II damage is linked with a longer absorption.
Document type :
Journal articles
Complete list of metadata

https://hal-polytechnique.archives-ouvertes.fr/hal-00463614
Contributor : Aurélien Houard Connect in order to contact the contributor
Submitted on : Saturday, March 13, 2010 - 1:11:51 AM
Last modification on : Wednesday, May 11, 2022 - 3:22:04 PM

Identifiers

Collections

Citation

Arnaud Couairon, Lionel Sudrie, Michel A. Franco, Bernard Prade, André Mysyrowicz. Filamentation and damage in fused silica induced by tightly focused femtosecond laser pulses. Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2005, 71 (12), pp.125435. ⟨10.1103/PhysRevB.71.125435⟩. ⟨hal-00463614⟩

Share

Metrics

Record views

3057