Development of functional materials by using ultrafast laser pulses
Development of functional materials by using ultrafast laser pulses
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DOI：
10.1117/12.2282426
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
Y. Shimotsuma;M. Sakakura;K. Miura
中科院分区：
文献类型：
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作者：
Y. Shimotsuma;M. Sakakura;K. Miura
利用超快激光脉冲成功地在各种材料中诱导出偏振相关的周期性纳米结构。各种材料中的周期性纳米结构可以根据经验分为以下三种类型：（1）结构缺陷，（2）膨胀结构，（3）部分相分离。这种周期性的纳米结构不仅表现出光学各向异性，但也有趣的电，热，磁性能。从入射光场与产生的电子等离子体相互作用的角度解释了周期性纳米结构的形成机理。此外，半导体中的周期性纳米结构仅在间接带隙半导体材料中才能凭经验形成的事实表明，带隙结构的应力依赖性和/或激发电子的复合也参与纳米结构的形成。最近，我们还证实了玻璃中的周期性纳米结构与是否存在大量的非桥氧有关。在演讲中，我们展示了常见材料功能化的新可能性，从永恒的5D光学存储，偏振成像到热电转换，基于所示的现象。
The polarization-dependent periodic nanostructures inside various materials are successfully induced by ultrafast laser pulses. The periodic nanostructures in various materials can be empirically classified into the following three types: (1) structural deficiency, (2) expanded structure, (3) partial phase separation. Such periodic nanostructures exhibited not only optical anisotropy but also intriguing electric, thermal, and magnetic properties. The formation mechanisms of the periodic nanostructure was interpreted in terms of the interaction between incident light field and the generated electron plasma. Furthermore, the fact that the periodic nanostructures in semiconductors could be formed empirically only if it is indirect bandgap semiconductor materials indicates the stress-dependence of bandgap structure and/or the recombination of the excited electrons are also involved to the nanostructure formation. More recently we have also confirmed that the periodic nanostructures in glass are related to whether a large amount of non-bridged oxygen is present. In the presentation, we demonstrate new possibilities for functionalization of common materials ranging from an eternal 5D optical storage, a polarization imaging, to a thermoelectric conversion, based on the indicated phenomena.