Ablation and optical third-order nonlinearities in Ag nanoparticles

Carlos Torres-Torres1, N&eacute;stor Per&eacute;a-L&oacute;pez2, Jorge Alejandro Reyes-Esqueda3, Luis Rodr&iacute;guez-Fern&aacute;ndez3, Alejandro Crespo-Sosa3, Juan Carlos Cheang-Wong3, Alicia Oliver31Section of Graduate Studies and Research, School of Mecha...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Carlos Torres-Torres, N&eacute;stor Per&eacute;a-L&oacute;pez, Jorge Alejandro Reyes-Esqueda, et al
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2010
Materias:	Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/2dfe6373fd804dd7ab6fd0ca2a2498e9
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:2dfe6373fd804dd7ab6fd0ca2a2498e9
record_format	dspace
spelling	oai:doaj.org-article:2dfe6373fd804dd7ab6fd0ca2a2498e92021-12-02T01:19:11ZAblation and optical third-order nonlinearities in Ag nanoparticles1176-91141178-2013https://doaj.org/article/2dfe6373fd804dd7ab6fd0ca2a2498e92010-11-01T00:00:00Zhttp://www.dovepress.com/ablation-and-optical-third-order-nonlinearities-in-ag-nanoparticles-a5680https://doaj.org/toc/1176-9114https://doaj.org/toc/1178-2013Carlos Torres-Torres1, N&eacute;stor Per&eacute;a-L&oacute;pez2, Jorge Alejandro Reyes-Esqueda3, Luis Rodr&iacute;guez-Fern&aacute;ndez3, Alejandro Crespo-Sosa3, Juan Carlos Cheang-Wong3, Alicia Oliver31Section of Graduate Studies and Research, School of Mechanical and Electrical Engineering, National Polytechnic Institute, Zacatenco, Distrito Federal, Mexico; 2Laboratory for Nanoscience and Nanotechnology Research and Advanced Materials Department, IPICYT, Camino a la Presa San Jose, San Luis Potosi, Mexico; 3Instituto de F&iacute;sica, Universidad Nacional Aut&oacute;noma de M&eacute;xico, A.P. 20-364, M&eacute;xico, D.F. 01000, M&eacute;xicoAbstract: 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.Keywords: nonlinear optics, laser irradiation, metallic nanoparticles, Kerr effect, nonlinear optical absorption Carlos Torres-TorresN&eacute;stor Per&eacute;a-L&oacute;pezJorge Alejandro Reyes-Esquedaet alDove Medical PressarticleMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol 2010, Iss default, Pp 925-932 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine (General) R5-920
spellingShingle	Medicine (General) R5-920 Carlos Torres-Torres N&eacute;stor Per&eacute;a-L&oacute;pez Jorge Alejandro Reyes-Esqueda et al Ablation and optical third-order nonlinearities in Ag nanoparticles
description	Carlos Torres-Torres1, N&eacute;stor Per&eacute;a-L&oacute;pez2, Jorge Alejandro Reyes-Esqueda3, Luis Rodr&iacute;guez-Fern&aacute;ndez3, Alejandro Crespo-Sosa3, Juan Carlos Cheang-Wong3, Alicia Oliver31Section of Graduate Studies and Research, School of Mechanical and Electrical Engineering, National Polytechnic Institute, Zacatenco, Distrito Federal, Mexico; 2Laboratory for Nanoscience and Nanotechnology Research and Advanced Materials Department, IPICYT, Camino a la Presa San Jose, San Luis Potosi, Mexico; 3Instituto de F&iacute;sica, Universidad Nacional Aut&oacute;noma de M&eacute;xico, A.P. 20-364, M&eacute;xico, D.F. 01000, M&eacute;xicoAbstract: 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.Keywords: nonlinear optics, laser irradiation, metallic nanoparticles, Kerr effect, nonlinear optical absorption
format	article
author	Carlos Torres-Torres N&eacute;stor Per&eacute;a-L&oacute;pez Jorge Alejandro Reyes-Esqueda et al
author_facet	Carlos Torres-Torres N&eacute;stor Per&eacute;a-L&oacute;pez Jorge Alejandro Reyes-Esqueda et al
author_sort	Carlos Torres-Torres
title	Ablation and optical third-order nonlinearities in Ag nanoparticles
title_short	Ablation and optical third-order nonlinearities in Ag nanoparticles
title_full	Ablation and optical third-order nonlinearities in Ag nanoparticles
title_fullStr	Ablation and optical third-order nonlinearities in Ag nanoparticles
title_full_unstemmed	Ablation and optical third-order nonlinearities in Ag nanoparticles
title_sort	ablation and optical third-order nonlinearities in ag nanoparticles
publisher	Dove Medical Press
publishDate	2010
url	https://doaj.org/article/2dfe6373fd804dd7ab6fd0ca2a2498e9
work_keys_str_mv	AT carlostorrestorres ablationandopticalthirdordernonlinearitiesinagnanoparticles AT nampeacutestorperampeacutealampoacutepez ablationandopticalthirdordernonlinearitiesinagnanoparticles AT jorgealejandroreyesesqueda ablationandopticalthirdordernonlinearitiesinagnanoparticles AT etal ablationandopticalthirdordernonlinearitiesinagnanoparticles
_version_	1718403130370031616

Ablation and optical third-order nonlinearities in Ag nanoparticles

Ejemplares similares