| 太赫兹频率下镁掺杂对氧化锌纳米粉体介电性能的影响 |
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| 引用本文： | 岳中岳,金钻明,李高芳,马国宏,毛智勇,祝迎春.太赫兹频率下镁掺杂对氧化锌纳米粉体介电性能的影响[J].红外与毫米波学报,2014,33(5):460-464. |
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| 作者姓名： | 岳中岳 金钻明 李高芳 马国宏 毛智勇 祝迎春 |
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| 作者单位： | 1. 上海大学物理系,上海,200444
2. 中国科学院上海硅酸盐研究所,上海,200050 |
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| 基金项目： | Supported by National Natural Science Foundation of China(11174195);Research Fund for the Doctoral Program of Higher Education of China(20123108110003) |
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| 摘 要： | 利用偶极天线LT-GaAs发射的太赫兹时域光谱(THz-TDS)研究单晶氧化锌、未掺杂和Mg掺杂的ZnO纳米粉末(粒子)在室温下的太赫兹光谱特性。在0.2~2 THz频率范围内研究了样品的功率吸收和折射率。结果发现,镁掺杂提高了样品材料的吸收效率,同时降低了氧化锌材料的折射率。相比较氧化锌单晶,未掺杂和Mg掺杂氧化锌纳米颗粒的太赫兹介电性质呈现类似的行为,该结果与横向光学E1(TO)声子模式有关。
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| 关 键 词： | 太赫兹时域光谱技术 掺杂 复介电常数 氧化锌纳米结构 |
| 收稿时间： | 2013/5/27 0:00:00 |
| 修稿时间： | 2013/9/10 0:00:00 |
Influence of Mg doping on dielectric properties of ZnO nanopowders at terahertz frequencies |
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| YUE Zhong-Yue,JIN Zuan-Ming,LI Gao-Fang,MA Guo-Hong,MAO Zhi-Yong and ZHU Ying-Chun.Influence of Mg doping on dielectric properties of ZnO nanopowders at terahertz frequencies[J].Journal of Infrared and Millimeter Waves,2014,33(5):460-464. |
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| Authors: | YUE Zhong-Yue JIN Zuan-Ming LI Gao-Fang MA Guo-Hong MAO Zhi-Yong and ZHU Ying-Chun |
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| Affiliation: | Laboratory of Ultrafast Photonics,Department of Physics,Shanghai University, Shangda Road,Laboratory of Ultrafast Photonics,Department of Physics,Shanghai University, Shangda Road,Laboratory of Ultrafast Photonics,Department of Physics,Shanghai University, Shangda Road,Laboratory of Ultrafast Photonics,Department of Physics,Shanghai University, Shangda Road,Shanghai Institute of Ceramics,Chinese Academy of Sciences and Shanghai Institute of Ceramics,Chinese Academy of Sciences |
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| Abstract: | Transmitted terahertz time-domain spectroscopy (THz-TDS) using dipole-antenna on LT-GaAs was applied to determine the THz spectral characteristics of single-crystal ZnO, pure-and Mg-doped ZnO nanopowders (NPs) at room temperature. The power absorption and refractive index were measured in the frequency range from 0.2 to 2 THz. Mg doping increases the absorption coefficient, while decreases the refractive index of the compound ZnO NPs. The THz dielectric properties of pure-and Mg-doped ZnO NPs exhibit similar behaviors with that of the ZnO single crystal, which are found to be associated with the transverse optical E1 (TO) phonon mode. |
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| Keywords: | complex dielectric constant ZnO nanostructure terahertz time-domain spectroscopy |
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