The optical nonlinearity of gold nanoparticles prepared by bioreduction method

A. Balbuena Ortega; M. L. Arroyo Carrasco; V. L. Gayou; A. Orduña Díaz; R. Delgado Macuil; Marlon Rojas López

doi:10.1117/12.2026459

18 November 2013 The optical nonlinearity of gold nanoparticles prepared by bioreduction method

A. Balbuena Ortega, M. L. Arroyo Carrasco, V. L. Gayou, A. Orduña Díaz, R. Delgado Macuil, Marlon Rojas López

Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 878587 (2013) https://doi.org/10.1117/12.2026459
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

Nonlinear optical and electronic properties of nanosized metal particles have drawn considerable attention because of their strong and size-dependent plasmon resonance absorption. In a metal nanoparticle system such as gold dispersed in a transparent matrix, an absorption peak due to surface plasmon resonance is usually observed in the visible spectral region. Metal nanoparticles are of special interest as nonlinear materials for optical switching and computing because of their relatively large third-order nonlinearity (χ3) and ultrafast response time. The purpose of this study was to analyze the nonlinear optical properties of biosynthesized gold nanoparticles. The samples were prepared by biosynthesis method using yeast extract as reducing agent and the nonlinear optical properties of the nanoparticles were investigated using a single beam Z-scan technique with a beam power of 20 mW and operated at wavelength of 514 nm. The reaction between metal ions and yeast extracts were monitored by UV–visible spectra of Au nanoparticles in aqueous solution with different pH (3-6). The surface plasmon peak position was shifted from 528 nm to 573 nm, according to of pH variation 4 to 6. The average particle size was calculated by the absorption peak position using the Fernig method, from 42 to 103 nm. The z-scan curves showed a negative nonlocal nonlinear refractive index with a magnitude dependent on the nanoparticle size.

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A. Balbuena Ortega, M. L. Arroyo Carrasco, V. L. Gayou, A. Orduña Díaz, R. Delgado Macuil, and Marlon Rojas López "The optical nonlinearity of gold nanoparticles prepared by bioreduction method", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 878587 (18 November 2013); https://doi.org/10.1117/12.2026459

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KEYWORDS

Nanoparticles

Gold

Yeast

Metals

Nonlinear optics

Absorption

Plasmons

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