Fabrication and characterization of spherical micro semiconductor crystals by laser ablation method
Fabrication and characterization of spherical micro semiconductor crystals by laser ablation method
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DOI：
10.1007/s00339-014-8529-6
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
T. Shimogaki;K. Okazaki;K. Yamasaki;K. Fusazaki;Y. Mizokami;N. Tetsuyama;M. Higashihata;H. Ikenoue;D. Nakamura;T. Okada
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文献类型：
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作者：
T. Shimogaki;K. Okazaki;K. Yamasaki;K. Fusazaki;Y. Mizokami;N. Tetsuyama;M. Higashihata;H. Ikenoue;D. Nakamura;T. Okada
我们一直在建立合适直径的球形半导体微晶的制造技术，以产生回音壁模式激光。具体地说，用高注量聚焦脉冲激光烧蚀各种烧结靶材，合成了半导体微球。在这份报告中，制作的氧化锌（ZnO）的微结构的激光波长的依赖关系进行了研究。测试了ZnO微球的激光特性和光致发光特性，并对Sb掺杂ZnO微球的光致发光特性进行了测试。此外，还发现Sb掺杂的ZnO和氮化铝微球可以类似地合成。通过开发这种不需要复杂处理的方法，预计在多种半导体中加速WGM激光应用的努力。
We have been establishing the technique of fabricating spherical semiconductor microcrystals with suitable diameters for whispering gallery mode (WGM) lasing. Concretely, semiconductor microspheres were synthesized by ablating various semiconductor-sintered targets with focused pulsed laser at high fluences. In this report, dependences of fabricated zinc oxide (ZnO) microstructures on laser wavelengths were investigated. Lasing characteristics and photoluminescence of ZnO microspheres were determined, and photoluminescence of Sb-doped ZnO microspheres were determined. Additionally, it was also found that Sb-doped ZnO and aluminum nitride microspheres can be similarly synthesized. By developing this method, which does not require complex processing, it is expected that efforts in the application of WGM lasing are accelerated in many kinds of semiconductors.