Absorptive and refractive nonlinearities by four-wave mixing for Au nanoparticles in ion-implanted silica
Por:
Torres-Torres C., Khomenko A.V., Cheang-Wong J.C., Rodríguez-Fernández L., Crespo-Sosa A., Oliver A.
Publicada:
1 ene 2007
Categoría:
Atomic and Molecular Physics, and Optics
Resumen:
We report a theoretical and experimental study on the real and imaginary part of the third-order nonlinear optical susceptibility at 532 nm and 7 ns pulse for high-purity silica samples containing Au nanoparticles prepared by ion implantation. We present a method for measuring the magnitude and sign of refractive and absorptive nonlinearities based on four-wave mixing (FWM). This method is derived from a comparison of the light intensities of incident and self-diffracted polarized waves. In the nanosecond regime the samples exhibit saturable absorption and it seems that a thermal effect is the mechanism responsible of nonlinearity of index. © 2007 Optical Society of America.
Filiaciones:
Torres-Torres C.:
Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, México, D. F. 01000, Mexico
Khomenko A.V.:
CICESE, División de Física Aplicada, A.P. 360, Ensenada, B.C. 22860, Mexico
Cheang-Wong J.C.:
Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, México, D. F. 01000, Mexico
Rodríguez-Fernández L.:
Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, México, D. F. 01000, Mexico
Crespo-Sosa A.:
Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, México, D. F. 01000, Mexico
Oliver A.:
Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, México, D. F. 01000, Mexico
All Open Access; Gold
|