Chalcogenide glasses with embedded ZnS nanocrystals: Potential mid-infrared laser host for divalent transition metal ions
Chalcogenide glasses with embedded ZnS nanocrystals: Potential mid-infrared laser host for divalent transition metal ions
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嵌入 ZnS 纳米晶体的硫系玻璃：二价过渡金属离子的潜在中红外激光宿主
DOI：
10.1111/jace.15247
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发表时间：
2018
影响因子：
3.9
通讯作者：
Pengfei Wang
中科院分区：
文献类型：
--
作者：
Xiaosong Lu;Yindong Zhang;Jing Ren;Elfed Lewis;Gerald Farrell;Anping Yang;Zhiyong Yang;Pengfei Wang
含有II - VI硫族化合物（ChG）纳米晶体（如ZnS/Se）的ChGs （ChGs）作为一种有前途的中红外非线性光学和激光材料得到了广泛的研究，但通过控制结晶法制备嵌入ChGs中的纯II - VI纳米晶体仍然是非常具有挑战性的。在本研究中，合成了一种新的ChGs和玻璃陶瓷（GCs）体系，即（100−x） As2S3-xZnSe (x= 0 ~ 30 mol%)，并对其物理和光学性能，包括密度、摩尔体积、显微硬度、玻璃化转变温度、玻璃网络结构、透射率和折射率进行了全面表征。值得注意的是，最初证明了纯ZnS纳米晶体可以通过简单的热处理过程在gc中析出。利用X射线衍射光谱研究了结晶的组成和热处理温度的依赖关系，并用高分辨率透射电镜研究了纳米晶体的形貌。嵌入ZnS纳米晶体的ChG GCs具有良好的透明度，可以作为二价过渡金属（如Cr2+/Fe2+等）的潜在主激光材料，从而用于超宽带可调谐连续或超短脉冲中红外光纤激光器。
Chalcogenide glasses (ChGs) containing II‐VI chalcogenide (ChG) nanocrystals such as ZnS/Se have recently been intensively studied as promising mid‐infrared nonlinear optics and laser materials, yet preparation of pure‐phase II‐VI nanocrystals embedded in ChGs via controlled crystallization is still very challenging. In this study, a new system of ChGs and glass ceramics (GCs), viz., (100−x)As2S3–xZnSe (x= 0 ~ 30 mol%), is synthesized, and its physical and optical properties including density, molar volume, microhardness, glass transition temperature, glass network structure, transmission, and refractive index are comprehensively characterized. Significantly, it is initially demonstrated that pure ZnS nanocrystals can be precipitated in GCs simply by a thermal treatment process. The composition and thermal treatment temperature dependencies of crystallization are studied using X‐ray diffraction spectroscopy, and the morphology of the nanocrystals by high‐resolution transmission electron microscope. The ChG GCs with embedded ZnS nanocrystals retaining good transparency can be a potential host laser material for divalent transition metals (e.g., Cr2+/Fe2+, etc.), and thus used for ultrabroadband tunable continuous or ultra‐short‐pulsed mid‐infrared fiber lasers.