Orientation effects on the bandgap and dispersion behavior of 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 single crystals

被引：37

作者：

He Chong-Jun ^{[1
]}

Fu Xin-Duo ^{[1
]}

Xu Feng ^{[1
]}

Wang Ji-Ming ^{[1
]}

Zhu Kong-Jun ^{[1
]}

Du Chao-Ling ^{[1
]}

Liu You-Wen ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Nanjing 210016, Peoples R China

来源：

CHINESE PHYSICS B | 2012年 / 21卷 / 05期

基金：

中国国家自然科学基金;

关键词：

dispersion; bandgap; orientation; LINEAR ELECTROOPTIC PROPERTIES; PZN-PT; PB(ZN1/3NB2/3)O-3-PBTIO3;

D O I：

10.1088/1674-1056/21/5/054207

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

0.91Pb(Zn1/3Nb2/3)O-3-0.09PbTiO(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, lambda(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.

引用

页数：5

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