Influence of Mg doping on dielectric properties of ZnO nanopowders at terahertz frequencies
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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,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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YUE Zhong-Yue, JIN Zuan-Ming, LI Gao-Fang, MA Guo-Hong, MAO Zhi-Yong, 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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History
  • Received:May 27,2013
  • Revised:September 10,2013
  • Adopted:October 14,2013
  • Online: November 12,2014
  • Published: