Femtosecond cubic optical nonlinearity of thin nickel films.
Transient pump-probe measurements of circular anisotropy in nickel films induced by 38-fs optical pulses show an instantaneous response that is related to the optical orientation of the spins of free electrons. Measurements in a sample of variable thickness, performed in both transmission and reflection, revealed that the surface significantly influences the degenerate cubic optical nonlinearity of the nickel films to a depth of approximately 4-5 nm into the bulk.
Bennett
P J
PJ
Albanis
V
V
Svirko
Y P
YP
Zheludev
N I
NI