硫系玻璃中巨大的光结构变化。近带隙拉曼散射研究AsxS100-x块体玻璃的非热光致聚合
Colossal photostructural changes in chalcogenide glasses. Athermal photoinduced polymerization in AsxS100-x bulk glasses revealed by near-bandgap Raman scattering
摘要：
近带隙拉曼散射被用来诱导和研究AsxS 100-x块体玻璃的光致结构变化，揭示了一种新的光致聚合效应。拉曼光谱也记录在非共振条件下允许的平衡玻璃结构和亚稳态照明引起的一个详细的比较。结果表明，在富S玻璃结构的变化涉及非热断裂的S8环和它们的聚合到Sn链。参与这种效应的键的分数是令人惊讶的高，是一个数量级高于相应的分数报告到现在为止，在硫族玻璃的光结构研究。
英文摘要：
Near-bandgap Raman scattering was used to induce and study photostructural changes in AsxS100-x bulk glasses revealing a new photoinduced polymerization effect. Raman spectra were recorded also in off-resonant conditions allowing for a detailed comparison between the equilibrium glass structure and the metastable one induced by illumination. It is shown that in S-rich glasses structural changes involve the athermal scission of S8 rings and their polymerization to Sn chains. The fraction of bonds involved in this effect is surprisingly high, being one order of magnitude higher than the corresponding fractions reported up to now in photostructural studies in chalcogenide glasses.
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