International Journal of Nanomedicine
Open access peer-reviewed scientific and medical journals.
Dove Medical Press is now a member of the Open Access Initiative
An Author's Guide
A guide to help authors get their paper published.
Support Open Access and Dove Press
Promotional Article Monitoring - further details
Favored Author Program
Real benefits for authors, including fast-track processing of papers.
Ablation and optical third-order nonlinearities in Ag nanoparticles
(5396) Total Article Views
Authors: Carlos Torres-Torres, Néstor Peréa-López, Jorge Alejandro Reyes-Esqueda, et al
Published Date November 2010
Volume 2010:5 Pages 925 - 932
Carlos Torres-Torres1, Néstor Peréa-López2, Jorge Alejandro Reyes-Esqueda3, Luis Rodríguez-Fernández3, Alejandro Crespo-Sosa3, Juan Carlos Cheang-Wong3, Alicia Oliver3
1Section 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 Física, Universidad Nacional Autónoma de México, A.P. 20-364, México, D.F. 01000, México
Abstract: 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
Cannotea Citeulike Del.icio.us Facebook LinkedIn Twitter
Readers of this article also read:
- ASNM conference 2014
Join us at the American Society for Nanomedicine Conference in Maryland, March 28th - 30th 2014.
- Impact Factors
- Have an opinion about one of our articles?
We encourage you to write a letter to the editor.
- Interested in being a peer-reviewer?
Click here to register.
Authors are welcome to send an abstract or draft manuscript to obtain a view from the Editor about the suitability of their paper. Please email here and include which journal you are interested in submitting your manuscript to. Our Editors will do a quick review of your paper and advise if they believe it is appropriate for submission to their journal.
- Formulation and evaluation of drug-loaded targeted magnetic microspheres for cancer therapy
- Fungus-mediated biological synthesis of gold nanoparticles: potential in detection of liver cancer
- Applications of gold nanoparticles in cancer nanotechnology
- Short communication: carboxylate functionalized superparamagnetic iron oxide nanoparticles (SPION) for the reduction of S. aureus growth post biofilm formation