ZHU Jia-Jun
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal UniversityZHANG Jin-Zhong
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal UniversityXU Gui-Sheng
R&D Center of Synthetic Crystals, Shanghai Institute of Ceramics, Chinese Academy of SciencesZHANG Xiao-Long
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal UniversityYU Wen-Lei
Department of Biomedical Engineering, School of Information and Engineering, Wenzhou Medical UniversityHU Zhi-Gao
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal UniversityCHU Jun-Hao
Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal UniversityKey Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,R&D Center of Synthetic Crystals, Shanghai Institute of Ceramics, Chinese Academy of Sciences,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Department of Biomedical Engineering, School of Information and Engineering, Wenzhou Medical University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University
The optical properties of Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 single crystal near morphotropic phase boundary were investigated by temperature dependent transmittance and reflectance spectra. The temperature dependent absorption edges show blueshifts below 300 K while they show redshifts above 300 K. At 303 K, optical band gap Eg is 3.25 eV, critical point energies Ea and Eb are 3.93 and 4.65 eV, respectively. With increasing temperature, Eg, Ea and Eb decrease and they are 3.05, 3.57, 4.56 eV at 453 K, respectively. Three critical point energies Eg,Ea and Eb are corresponding to O 2p to Ti d, and Pb 6p, respectively. Such narrowing trends with increasing temperature can be explained by thermal expansion of the lattice and electron-phonon interaction. Based on Tauc-Lorentz dispersion models, the dielectric functions from 3.1 to 6.5 eV have been extracted from303 to 453 K. It was found that the refractive index n increases with increasing temperature.
ZHU Jia-Jun, ZHANG Jin-Zhong, XU Gui-Sheng, ZHANG Xiao-Long, YU Wen-Lei, HU Zhi-Gao, CHU Jun-Hao. UV-Vis-NIR optical properties of Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 single crystal[J]. Journal of Infrared and Millimeter Waves,2015,34(4):442~446
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