Third-order nonlinearity of nickel oxide nanoparticles in toluene.
We report measurements of the nonlinear refractive index, n(2), of nickel oxide nanoparticles (NPs) in toluene at 532 nm. The measurements were performed using the Z-scan technique with 80 ps laser pulses at 7 Hz. Large values of n(2) in the range of 10(-13)-10(-12) cm(2)/W were measured, and negligible two-photon absorption coefficient was estimated for colloids having NP filling fractions in the range of 10(-8)-10(-7).
Gómez
Luis A
LA
Departamento de Física, Universidade Federal de Pernambuco, Pernambuco, Brazil.
de Araújo
Cid B
CB
Rossi
L M
LM
Masunaga
S H
SH
Jardim
R F
RF