Z-scan study of nonlinear absorption of gold nano-particles prepared by ion implantation in various types of silicate glasses

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• 作者：W. Husinsky^a ; A. Ajami^a ; ^{ali_ajami80@yahoo.com} ; P. Nekvindova^b ; B. Svecova^b ; J. Pesicka^c ; M. Janecek^c
• 关键词：Silicate glass ; Metal nano-particles ; Nonlinear absorption ; Au  ; + ion implantation ; Z-scan ; Ultra short lasers
• 刊名：Optics Communications
• 出版年：2012
• 期刊代码：50_00304018
• 类别：ph
• 出版时间：15 May, 2012
• 卷：285
• 期：10-11
• 页码：2729-2733
• 文件大小：661 K

摘要

Metal nano-clusters composite glasses synthesized by ion implantation have been shown as promising nonlinear photonic material. In this paper, we report on the nonlinear absorption measurements of gold nano-particles implanted in four structurally different types of silicate glasses. All targets containing gold nano-particles in a layer 500 nm under the surface of the glass have been prepared by ion implantation with subsequent annealing. The targets were characterized by UV-VIS absorption spectroscopy, transmission electron microscopy (TEM) and by the Z-scan technique. The resulting nano-particles differed in size, range of particle size and shape as well as depth distribution characteristic for glasses with different chemical compositions. With the Z-scan technique, it can be shown that the nano-particles produced in silicate glasses exhibit substantial two-photon absorption (TPA). The TPA coefficient differed depending on size, shape, and depth distribution of the metal nano-clusters and the structure and composition of the glass substrates. The highest TPA coefficient (16.25 cm/GW) was found for the glass BK7 in which the largest non-spherical nano-particles have been observed in the thinnest layer.