Improvement of photorefractive properties in Hf:Fe:LiNbO3 crystals with various [Li]/[Nb] ratios

doi:10.1088/1674-1056/19/9/094209

中国物理B ›› 2010, Vol. 19 ›› Issue (9): 94209-094209.doi: 10.1088/1674-1056/19/9/094209

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇下一篇

Improvement of photorefractive properties in Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios

孙秀冬, 石宏新, 骆素华, 孟庆鑫, 姜永远

Department of Physics, Harbin Institute of Technology, Harbin 150001, China

收稿日期:2010-01-05 修回日期:2010-03-12 出版日期:2010-09-15 发布日期:2010-09-15
基金资助:
Project supported by the Fundamental Research Foundation of Commission of Science Technology, Industry for National Defense of China (Grant No. 2320060089), and National Basic Research and Development Program of China (Grant No. 2007CB3070001) and Program

Improvement of photorefractive properties in Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios

Sun Xiu-Dong(孙秀冬)^†, Shi Hong-Xin(石宏新), Luo Su-Hua(骆素华), Meng Qing-Xin(孟庆鑫), and Jiang Yong-Yuan(姜永远)

Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Received:2010-01-05 Revised:2010-03-12 Online:2010-09-15 Published:2010-09-15
Supported by:
Project supported by the Fundamental Research Foundation of Commission of Science Technology, Industry for National Defense of China (Grant No. 2320060089), and National Basic Research and Development Program of China (Grant No. 2007CB3070001) and Program of Excellent Team in Harbin Institute of Technology, China.

摘要/Abstract

摘要： Photorefractive properties of Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios have been investigated at 488 nm wavelength based on the two-wave coupling experiment. High diffraction efficiency and large recording sensitivity are observed and explained. The decrease in Li vacancies is suggested to be the main contributor to the increase in the photoconductivity and subsequently to the induction of the improvement of recording sensitivity. The saturation diffraction efficiency is measured up to 80.2%, and simultaneously the recording sensitivity of 0.91 cm/J is achieved to in the Hf:Fe:LiNbO₃ crystal grown from the melt with the [Li]/[Nb] ratio of 1.20, which is significantly enhanced as compared with those of the Hf:Fe:LiNbO₃ crystal with the [Li]/[Nb] ratio of 0.94 in melt under the same experimental conditions. Experimental results definitely show that increasing the [Li]/[Nb] ratio in crystal is an effective method for Hf:Fe:LiNbO₃ crystal to improve its photorefractive properties.

Abstract: Photorefractive properties of Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios have been investigated at 488 nm wavelength based on the two-wave coupling experiment. High diffraction efficiency and large recording sensitivity are observed and explained. The decrease in Li vacancies is suggested to be the main contributor to the increase in the photoconductivity and subsequently to the induction of the improvement of recording sensitivity. The saturation diffraction efficiency is measured up to 80.2%, and simultaneously the recording sensitivity of 0.91 cm/J is achieved to in the Hf:Fe:LiNbO₃ crystal grown from the melt with the [Li]/[Nb] ratio of 1.20, which is significantly enhanced as compared with those of the Hf:Fe:LiNbO₃ crystal with the [Li]/[Nb] ratio of 0.94 in melt under the same experimental conditions. Experimental results definitely show that increasing the [Li]/[Nb] ratio in crystal is an effective method for Hf:Fe:LiNbO₃ crystal to improve its photorefractive properties.

Key words: diffraction efficiency, recording sensitivity, Hf:Fe:LiNbO₃ crystals

中图分类号:

4265

孙秀冬, 石宏新, 骆素华, 孟庆鑫, 姜永远. Improvement of photorefractive properties in Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios[J]. 中国物理B, 2010, 19(9): 94209-094209.

Sun Xiu-Dong(孙秀冬), Shi Hong-Xin(石宏新), Luo Su-Hua(骆素华), Meng Qing-Xin(孟庆鑫), and Jiang Yong-Yuan(姜永远). Improvement of photorefractive properties in Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios[J]. Chin. Phys. B, 2010, 19(9): 94209-094209.

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Improvement of photorefractive properties in Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios

Improvement of photorefractive properties in Hf:Fe:LiNbO₃ crystals with various [Li]/[Nb] ratios

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