Refractive index dispersion and anisotropy in Ca0.28Ba0.72Nb2O6 by Zhang Ruifeng, Lian Jie, Wang Qingpu, Wang Yurong, Wei Aijian, Jiang Jun, Yi Xiujie, Chen Huanchu, and Han Jianru

Crystal Research and Technology

Cryst. Res. Technol. 41, 494 (2006) - Abstract -

Refractive index dispersion and anisotropy in Ca_0.28Ba_0.72Nb₂O₆

Zhang Ruifeng, Lian Jie, Wang Qingpu, Wang Yurong, Wei Aijian, Jiang Jun*, Yi Xiujie**, Chen Huanchu**, and Han Jianru**

School of Information Science and Engineering, Shandong University, Jinan, Shandong Province 250100, China
*School of machine electronics, Qingdao University, Qingdao 266000, China
**State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong Province 250100, China

Keywords	CBN crystal, refractive index dispersion, birefringence
PACS	78.20.Ci, 78.20.Fm, 42.70.Mp
DOI	10.1002/crat.200510611

Room-temperature refractive indices dispersion and anisotropy were measured in single Ca_0.28Ba_0.72Nb₂O₆ (CBN-28) crystal between 380 and 700 nm. The refractive index of Ca_0.28Ba_0.72Nb₂O₆ are measured by the spectroscopic ellipsometry. The dispersion curves were fitted to different Sellemeier functions. The normal dispersions were observed. Using the interference of polarized light, the birefringence in the long wavelength region is obtained. The results are in good agreement with the reference. A new technique was used to analysis the experiment data and this technique is proved to be more simple and efficient.

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