Terahertz emission via ultrashort-pulse excitation of magnetic metal films.
We observe terahertz emission by optical rectification of an intense 1.5-eV, 50-fs pulse in single-crystal iron thin films grown by molecular beam epitaxy. The azimuthal dependence of the emission indicates the presence of a magnetic nonlinearity and a nonmagnetic surface nonlinearity.
Hilton
D J
DJ
MST-10, DX-2, and NMT-16, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. dhilton@lanl.gov
Averitt
R D
RD
Meserole
C A
CA
Fisher
G L
GL
Funk
D J
DJ
Thompson
J D
JD
Taylor
A J
AJ