Observations of fractal patterns induced on surface of chalcogenide glass

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• 作者：Junfeng Xu ; Hu Cheng ; ^{ch1252005@126.com" class="auth_mail" title="E-mail the corresponding author} ; Chao Zheng ; Fang &rsquo ; e Chang ; Zengyun Jian
• 关键词：Chalcogenide glass ; Fractal ; Infrared transmittance ; Aggregation
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：127
• 期：23
• 页码：11258-11262
• 全文大小：1188 K

文摘

Properties of chalcogenide glasses were studied. After heat treatment, fractal patterns were found on surfaces of Ge₂₃Se₆₇Sb₁₀ and Ge₃₀Se₆₀Sb₁₀ glasses. According to box counting method, the fractal dimensions are determined as 1.58–1.61, which are similar to that of the fractal crystal GeSe₂. By analysis, the main factors for the formation of the fractal patterns are the glass structure and the weak interface energy anisotropy. Comparing the fractal pattern with compact seaweed pattern in undercooled Co-Sn melt, the growth mechanism of the fractal pattern in glass is similar to that in undercooled melt, i.e. the larger undercooling leads to the weaker of the interfacial energy anisotropy, which leads to the formation of fractal structure.