Cubic optical nonlinearity of free electrons in bulk gold.
A fast (Tau(response) <90 fs) free-electron spin-f lipping frequency-degenerate nonlinearity with a signif icant value of|chi((3))(xxyy)(omega,omega,omega,-omega)chi((3))(xxyy)(omega,omega,omega,-omega)|~10(-)(8)esu has been observed in bulk gold at 1260 nm by use of a new pump-probe polarization-sensitive technique.
N I
NI
Zheludev
P J
PJ
Bennett
H
H
Loh
S V
SV
Popov
I R
IR
Shatwell
Y P
YP
Svirko
V E
VE
Gusev
V F
VF
Kamalov
E V
EV
Slobodchikov