Photoluminescence and terahertz emission from femtosecond laser-induced plasma channels.
Luminescence as a mechanism for terahertz emission from femtosecond laser-induced plasmas is studied. By using a fully microscopic theory, Coulomb scattering between electrons and ions is shown to lead to luminescence even for a spatially homogeneous plasma. The spectral features introduced by the rod geometry of laser-induced plasma channels in air are discussed on the basis of a generalized mode-function analysis.
Hoyer
W
W
Arizona Center for Mathematical Sciences and Optical Sciences Center, University of Arizona, Tucson, AZ 85721, USA. hoyer@acms.arizona.edu
Knorr
A
A
Moloney
J V
JV
Wright
E M
EM
Kira
M
M
Koch
S W
SW