Résumé
We report the first space-time observation of the ultrafast excitation and relaxation of an electron gas pumped into the conduction band of a wide band-gap insulator by an intense subpicosecond laser pulse. The experiment is based on a new phase-sensitive technique which allows a resolution of 120 fs in time and 5 μm in space. In crystalline and amorphous SiO2, no evidence of gas expansion has been observed and a mean trapping time of 150 fs for the photogenerated carriers is measured.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 1990-1993 |
| Nombre de pages | 4 |
| journal | Physical Review Letters |
| Volume | 73 |
| Numéro de publication | 14 |
| Les DOIs | |
| état | Publié - 1 janv. 1994 |
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