0.91Pb（Zn1/3Nb2/3）O3-0.09PbTiO 3（PZN-9%PT） single crystals with different orientations are investigated by using a spectroscopic ellipsometer,and the refractive indices and the extinction coefficients are obtained...0.91Pb（Zn1/3Nb2/3）O3-0.09PbTiO 3（PZN-9%PT） single crystals with different orientations are investigated by using a spectroscopic ellipsometer,and the refractive indices and the extinction coefficients are obtained.The Sellmeier dispersion equations for the refractive indices are obtained by the least square fitting,which can be used to calculate the refractive indices in a low absorption wavelength range.Average Sellmeier oscillator parameters E o,位 o,S o,and E d are calculated by fitting with the single-term oscillator equation,which are related directly to the electronic energy band structure.The optical energy bandgaps are obtained from the absorption coefficient spectra.Our results show that the optical properties of [001] and [111] poled crystals are very similar,but quite different from those of the [011] poled crystal.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.60808026,11174147,50872053,50902027 and 11004103)the Specialized Research Fund for the Doctoral Program of Higher Education,China(Grant No.20093218120030)+3 种基金the Nanjing University of Aeronautics and Astronautics Research Funding,China(Grant No.NP2011037)the Program for New Century Excellent Talents in University,China(Grant No.NCET-10-0070)the Prior Project in Key Science & Technology Program of Zhejiang Province,China(Grant No.2009C11144)the Cultivation Fund of the Key Scientific and Technical Innovation Project of Ministry of Education of China(Grant No.707031)
文摘0.91Pb（Zn1/3Nb2/3）O3-0.09PbTiO 3（PZN-9%PT） single crystals with different orientations are investigated by using a spectroscopic ellipsometer,and the refractive indices and the extinction coefficients are obtained.The Sellmeier dispersion equations for the refractive indices are obtained by the least square fitting,which can be used to calculate the refractive indices in a low absorption wavelength range.Average Sellmeier oscillator parameters E o,位 o,S o,and E d are calculated by fitting with the single-term oscillator equation,which are related directly to the electronic energy band structure.The optical energy bandgaps are obtained from the absorption coefficient spectra.Our results show that the optical properties of [001] and [111] poled crystals are very similar,but quite different from those of the [011] poled crystal.
