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P. Audebert; Ph. Daguzan; A. Dos Santos; J. C. Gauthier; J. P. Geindre; S. Guizard; G. Hamoniaux; K. Krastev; P. Martin; G. Petite; A. Antonetti

doi:10.1103/PhysRevLett.73.1990

Space-Time Observation of an Electron Gas in Si $O_{2}$

P. Audebert, Ph. Daguzan, A. Dos Santos, J. C. Gauthier, J. P. Geindre, S. Guizard, G. Hamoniaux, K. Krastev, P. Martin, G. Petite, and A. Antonetti

Phys. Rev. Lett. 73, 1990 – Published 3 October 1994

Abstract

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 Si $O_{2}$ , no evidence of gas expansion has been observed and a mean trapping time of 150 fs for the photogenerated carriers is measured.

Received 12 April 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.1990

Authors & Affiliations

P. Audebert¹, Ph. Daguzan², A. Dos Santos³, J. C. Gauthier¹, J. P. Geindre¹, S. Guizard², G. Hamoniaux³, K. Krastev², P. Martin², G. Petite², and A. Antonetti³

¹LULI, Ecole Polytechnique, 91128 Palaiseau, France
²Commissariat à l'Energie Atomique, DRECAM/SRSIM, 91191 Gif sur Yvette, France
³Laboratoire d'Optique Appliqueé, École Nationale Supérieure de Techniques Avancées, Batterie de l'Yvette, 91120 Palaiseau, France