Composition dependence of thermally induced second-harmonic generation in chalcohalide glasses
Composition dependence of thermally induced second-harmonic generation in chalcohalide glasses
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DOI：
10.1007/s10853-007-1514-0
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发表时间：
2007-04
影响因子：
4.5
通讯作者：
Haitao Guo;Xiaolin Zheng;Xiujian Zhao;Guojun Gao;Y. Gong;S. Gu
中科院分区：
文献类型：
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作者：
Haitao Guo;Xiaolin Zheng;Xiujian Zhao;Guojun Gao;Y. Gong;S. Gu
通过研究（100 − 2x）GeS2·xGa2S3·xPbI2（x= 5、10、15和20）系列硫卤玻璃样品热极化后的二次谐波产生（SHG），发现每种成分都存在最佳极化温度，最佳极化温度与玻璃转变温度之间也存在关系。随着x的增大，二阶极化率χ（2）呈现先增大后减小的趋势，在x = 15时达到最大值。提出了一种偶极重取向模型和Ga2S3和PbI2引起的结构弛豫，解释了极化温度对各组分SH强度的依赖关系以及该硫卤玻璃系列中最大χ（2）的存在.
By investigating the second-harmonic generation (SHG) of the series (100 − 2x)GeS2·xGa2S3·xPbI2(x= 5, 10, 15, and 20) chalcohalide glass samples after thermal poling, it was found that there was an optimal poling temperature for each composition and there was also a relation between optimal poling temperature and glass transition temperature. With increasingx, the obtained second-order susceptibility χ(2)shows an increase first and then decrease, and the maximum was seen atx= 15. A dipole reorientation model and structural relaxation causing by Ga2S3and PbI2were proposed to explain the dependence of poling temperature on SH intensity for each composition and the presence of the maximum χ(2)in this chalcohalide glass series.