Femtosecond microscopy of radial energy transport in a micrometer-scale aluminum plasma excited at relativistic intensity.
Using femtosecond microscopy, we observe subpicosecond transport of thermal energy radially outward from a micrometer-sized spot of an aluminum target following P-polarized excitation at >10(18) W/cm2 with a 24 fs pulse. The rapid expansion coincides with the onset of nonlocal energy transport dominated by radiation and hot electrons.
Bowes
B T
BT
FOCUS Center, Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA. bowes@physics.utexas.edu
Langhoff
H
H
Downer
M C
MC
Wilcox
M
M
Hou
B
B
Nees
J
J
Mourou
G
G