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Photorefractive Properties of Paraelectric Copper Doped Potassium Tantalate Niobate |
GUAN Qingcai;WANG Jiyang;WANG Min;LIU Yaogang;WEI Jingqian;ZHANG Zhiguo*;YANG Changxi*;YE Peixian* |
Institute of Crystal Materials, Shandong University, Jinan 250100
*Institute of Physics, Academia sinica, Beijing 100080 |
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Cite this article: |
GUAN Qingcai, WANG Jiyang, WANG Min et al 1991 Chin. Phys. Lett. 8 515-517 |
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Abstract The photorefractive properties of Cu doped KTa1-x NbxO3 have been studied by using two-wave mixing method. The diffraction efficiency reaches as high as 52% under an electric field. The dependences of diffraction efficiency on interference angles and applied fields have been studied. The maximum light induced index change is found to be 2.33 x10-5 and the photorefraction sensitivity calculated is 5 x 10-6cm2/J. Experimental results demonstrate that electrons are the dominant charge carriers.
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Keywords:
42.70.Gi
78.20.Jq
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Published: 01 October 1991
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