Synthesis and nonlinear optical properties of single-crystalline KNb3O8 nanowires
Synthesis and nonlinear optical properties of single-crystalline KNb3O8 nanowires
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DOI：
10.1088/0957-4484/24/8/085704
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发表时间：
2013-03
期刊：
影响因子：
3.5
通讯作者：
Bin Yu;B. Cao;H. Cao;Xinpeng Zhang;Danni Chen;J. Qu;H. Niu
中科院分区：
文献类型：
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作者：
Bin Yu;B. Cao;H. Cao;Xinpeng Zhang;Danni Chen;J. Qu;H. Niu
通过在熔融KCl和K2 SO 4中煅烧Nb 2 O 5粉末，合成了宽度为100-300 nm，长度可达数十微米的KNb 3 O 8单晶纳米线。用X射线衍射仪测定了产物的物相，用扫描电子显微镜、透射电子显微镜、高分辨透射电子显微镜和选区电子衍射技术对产物的形貌和结构进行了表征。KNb_3O_8晶体的生长方向为[001]晶向。同时，对二次谐波响应的偏振响应进行了研究。所合成的纳米线清楚地表现出SHG响应，这意味着纳米线是一种有效的纳米级二次谐波光源。KNb_3O_8具有优良的非线性光学性能，在纳米光学器件中具有潜在的应用前景。
Single-crystalline KNb3O8 nanowires with widths of 100–300 nm and lengths up to tens of microns were synthesized by calcining Nb2O5 powders in molten KCl and K2SO4. The phase of the products was determined by means of x-ray diffraction, and the morphology and structure were characterized by using scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy and selected area electron diffraction techniques. The growth direction of the KNb3O8 obtained was determined to be the [001] crystallographic direction. Meanwhile, the polarization response of the second-harmonic generation (SHG) response was investigated. The as-synthesized nanowires clearly exhibited a SHG response, which means that the nanowires were an efficient nanoscale second-harmonic light source. The excellent nonlinear optical property of KNb3O8 shows potential for application in nano-optical devices.