Photorefractive properties of paraelectric potassium lithium tantalate niobate crystal doped with iron |
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Authors: | Hao Tian Zhongxiang Zhou Dewei Gong Haifeng Wang Yongyuan Jiang Chunfeng Hou |
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Affiliation: | Department of Physics, Harbin Institute of Technology, Harbin 150001, PR China |
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Abstract: | We report the successful growth of paraelectric potassium lithium tantalate niobate (KLTN) single crystal doped with iron. Detailed investigations have been made on the photorefractive properties of the as-grown crystal. The key parameters such as space-charge field, grating response time, photorefractive sensitivity and sign of the dominant charge carrier were obtained by two-wave mixing technique. 1.7 mm thick sample exhibits a high diffraction efficiency of 78% at the external field of 3.3 kV/cm and a sensitivity of 1.49 × 10−10E0 cm2/J. The two-wave mixing gain coefficient increases linearly with external field, and reaches a large value of 19.4 cm−1 at 4 kV/cm. Based on experimental results, iron is an effective dopant to KLTN which shows high diffraction efficiency and two-wave mixing gain coefficient. |
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Keywords: | KLTN Paraelectric photorefractive Electroholography Two-wave mixing |
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