TIME-RESOLVED PROBING OF ELECTRON THERMAL TRANSPORT IN PLASMA PRODUCED BY FEMTOSECOND LASER-PULSES

被引：30

作者：

VU, BTV ^{[1
]}

SZOKE, A ^{[1
]}

LANDEN, OL ^{[1
]}

机构：

[1] UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.72.3823

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first direct evidence for a supersonically moving steep ionization front in a solid density hot plasma. The plasma was produced by irradiating a transparent solid target with 100 fsec laser pulses at a peak intensity of 5 x 10(14) W/cm2. Time-resolved measurements of reflectivity, transmissivity, and frequency shift of a probe light, incident on the rear of the plasma, showed rapid formation of an over-dense plasma layer with a steep gradient that penetrates supersonically into the bulk target. Calculations using a simple nonlinear heat wave model, driven by electron thermal transport, show good agreement with the experimental results.

引用

页码：3823 / 3826

页数：4