祝贺向卫东和梁晓娟老师指导研究生在materials research bulletin上发表学术论文-威尼斯人888

标题：optical properties of bimetallic au-cu nanocrystals embedded in glass

abstact：bimetallic gold-copper and gold-copper solid solutions nanocrystals (ncs) with orthorhombic morphologies were successfully embedded in sodium borosilicate glass; these materials were fabricated via a facile and synthetic sol-gel technique. microstructural investigations demonstrate that the au-cu intermetallic nanostructure is generated in the glass host. z-scan technique was applied to reveal the third-order nonlinear optical properties of the as-obtained glasses at the wavelength of 800 nm. the as-synthesized glasses exhibit similar nonlinear behaviors with reverse saturation absorption effects and self-focusing performances. the third-order nonlinear susceptibility χ(3) values were optimized by tuning the sizes of the au-cu ncs. the χ(3) of au-cu(1), au-cu(2) and au-cu(3) measured to be 3.1 × 10-12, 5.4 × 10-12, and 4.4 × 10-12 esu for the single-pulse energy of 1 μj. we have discussed the nonlinear optical mechanism of au-cu sodium borosilicate glass that may be due to the quantum confinement effects and surface plasmon resonance effects.

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