Colossal photostructural changes in chalcogenide glasses: Athermal photoinduced polymerization in AsxS100-x bulk glasses revealed by near-bandgap Raman scattering

被引：37

作者：

Kyriazis, F. ^{[1
,2
]}

Yannopoulos, S. N. ^{[1
]}

机构：

[1] Fdn Res & Technol Hellas, Inst Chem Engn & High Temp Chem Proc, GR-26504 Rion, Greece

[2] Univ Patras, Dept Chem, GR-26504 Rion, Greece

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 10期

关键词：

arsenic compounds; chalcogenide glasses; glass structure; photochemistry; polymerisation; Raman spectra; STRUCTURAL-CHANGES; LIQUID SULFUR; FILMS; SEMICONDUCTORS; TRANSITION;

D O I：

10.1063/1.3095849

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Near-bandgap Raman scattering was used to induce and study photostructural changes in AsxS100-x bulk glasses (5 <= x(As)<= 40) 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 S-8 rings and their polymerization to S-n 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.

引用

页数：3