SPACE-TIME OBSERVATION OF AN ELECTRON-GAS IN SIO2

被引:239
作者
AUDEBERT, P
DAGUZAN, P
DOSSANTOS, A
GAUTHIR, JC
GEINDRE, JP
GUIZARD, S
HAMONIAUX, G
KRASTEV, K
MARTIN, P
PETITE, G
ANTONETTI, A
机构
[1] CEA,DRECAM SRSIM,F-91191 GIF SUR YVETTE,FRANCE
[2] ECOLE NATL SUPER TECH AVANCEES,OPT APPL LAB,F-91120 PALAISEAU,FRANCE
关键词
D O I
10.1103/PhysRevLett.73.1990
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 mum 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.
引用
收藏
页码:1990 / 1993
页数:4
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