Título

Ablation and optical third-order nonlinearities in Ag nanoparticles

Autor

Carlos Torres Torres

NESTOR PEREA LOPEZ

JORGE ALEJANDRO REYES ESQUEDA

Luis Rodríguez Fernández

ALEJANDRO CRESPO SOSA

JUAN CARLOS CHEANG WONG

Alicia Oliver

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Identificador alterno

doi: https://doi.org/10.2147/IJN.S12463

Materias

Nonlinear optics - (AUTOR) Laser irradiation - (AUTOR) Metallic nanoparticles - (AUTOR) Kerr effect - (AUTOR) Nonlinear optical - (AUTOR) Absorption - (AUTOR) INGENIERÍA Y TECNOLOGÍA - (CTI) CIENCIAS TECNOLÓGICAS - (CTI) CIENCIAS TECNOLÓGICAS - (CTI)

Resumen o descripción

"The optical damage associated with high intensity laser excitation of silver nanoparticles (NPs) was studied. In order to investigate the mechanisms of optical nonlinearity of a nanocomposite and their relation with its ablation threshold, a high-purity silica sample implanted with Ag ions was exposed to different nanosecond and picosecond laser irradiations. The magnitude and sign of picosecond refractive and absorptive nonlinearities were measured near and far from the surface plasmon resonance (SPR) of the Ag NPs with a self-diffraction technique. Saturable optical absorption and electronic polarization related to self-focusing were identified. Linear absorption is the main process involved in nanosecond laser ablation, but nonlinearities are important for ultrashort picosecond pulses when the absorptive process become significantly dependent on the irradiance. We estimated that near the resonance, picosecond intraband transitions allow an expanded distribution of energy among the NPs, in comparison to the energy distribution resulting in a case of far from resonance, when the most important absorption takes place in silica. We measured important differences in the ablation threshold and we estimated that the high selectiveness of the SPR of Ag NPs as well as their corresponding optical nonlinearities can be strongly significant for laser-induced controlled explosions, with potential applications for biomedical photothermal processes."

Editor

Dove Press Ltd

Fecha de publicación

2010

Tipo de publicación

Artículo

Versión de la publicación

Versión publicada

Recurso de información

http://ipicyt.repositorioinstitucional.mx/jspui/handle/1010/1948

Formato

application/pdf

Relación

&

Oliver, A. (2010). Ablation and optical third-order nonlinearities in Ag nanoparticles. International journal of nanomedicine, 5, 925–932. doi:10.2147/IJN.S12463

Sugerencia de citación

Torres-Torres, C., Peréa-López, N., Reyes-Esqueda, J. A., Rodríguez-Fernández, L., Crespo-Sosa, A., Cheang-Wong, J. C.,

Repositorio Orígen

Repositorio IPICYT

Descargas

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