Third-order nonlinear optical response of colloidal gold nanoparticles prepared by sputtering deposition

Abstract

The nonlinear optical responses of gold nanoparticles dispersed in castor oil produced by sputtering deposition were investigated, using the thermally managed Z-scan technique. Particles with spherical shape and 2.6 nm of average diameter were obtained and characterized by transmission electron microscopy and small angle X-ray scattering. This colloid was highly stable, without the presence of chemical impurities, neither stabilizers. It was observed that this system presents a large refractive third-order nonlinear response and a negligible nonlinear absorption. Moreover, the evaluation of the all-optical switching figures of merit demonstrated that the colloidal nanoparticles prepared by sputtering deposition have a good potential for the development of ultrafast photonic devices.

High-order optical nonlinearities in plasmonic nanocomposites—a review

“…When applied to the study of MDNCs, the nonlinearity management can be done by varying f and the incident laser intensity [98,105]. Indeed, due to large nonlinearity of metallic NPs, small changes in the filling fraction may produce significant modifications of the effective NL response of the nanocomposite [72,101,106,107].…”

Enhanced nonlinear optical responses of zinc diaminopyrimidin-2-ylthio phthalocyanine conjugated to AgxAuy alloy nanoparticles

“…Research into nonlinear optical (NLO) activities of Au and Ag nanoparticles has increased in recent years as a result of their exceptional large third-order susceptibilities, and ultra-fast response time [1][2][3][4], which are needed to protect lightsensitive materials from potentially dangerous laser radiation. Research focus on optical limiting (OL) properties of metallic nanoparticle is gradually expanding and evolving from monometallic into bimetallic (Ag x Au 1-x ) [5][6][7] nanoparticles.…”

“…The NLO properties of MPcs have been reported to be based on mechanism involving sequential and/or simultaneous absorption of photons in the T 1 -T n excited states; a process referred to as reverse saturable absorption (RSA) [16]. Significant The present work describes the enhancement of optical limiting response of zinc diaminopyrimidin-2-ylthio phthalocyanine (2) in the presence of Ag x Au y alloy nanoparticles. The synthesis of luthetium and cobalt analogues of diaminopyrimidin-2-ylthio phthalocyanine have been reported before [24,25], the Zn derivative is reported in this work for the first time.…”

“…A metal-assisted (Zn acetate) cyclotetramerization process of compound 1 occurred in the presence of catalytic DBU and high-boiling solvent nhexanol for 6 h to afford peripherally tetra-substituted zinc phthalocyanine(2). The synthesized molecule 2 was purified by column chromatography on SiO 2 as stationary phase, and diethyl ether/DMF as eluents to afford green solid product.…”

A Novel Physical Approach for Cationic–Thiolate Protected Fluorescent Gold Nanoparticles

“…Recently, metal sputtering over liquid matrix 18 19 20 21 22 23 24 25 26 has been demonstrated in order to prepare colloidal metal NPs without the use of reductants. Moreover, we have developed this approach for organic–protected metal NPs, and termed it as the “matrix sputtering method” 18 19 20 21 22 23 .…”