| Light-induced acoustic effect in LiNbO3：Fe：Ce crystals |
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| 引用本文： | 黄伟,吴仲康,王长青.Light-induced acoustic effect in LiNbO3：Fe：Ce crystals[J].中国物理 B,2005,14(11):2231-2234. |
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| 作者姓名： | 黄伟 吴仲康 王长青 |
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| 作者单位： | Department of Basic, Beijing Institute of Civil Engineering and Architecture, Beijing 100044, China;Photonics Center, Department of Physics, Nankai University,Tianjin 300071, China;Institute of Crystal Materials, National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 69908003). |
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| 摘 要： | The phenomena of acoustic emission in LiNbO3：Fe：Ce crystals have been observed in the process of light-induced quasi-breakdown. It is found that the ultra-high frequency acoustic signal introduced into the crystal is modulated by the low frequency acoustic waves. Its frequency increases with the increase of the intensity of incident light and its jump period of breakdown is the same as that of the photovoltaic current Ic, the change of light-induced refractive index △n and the diffracted light intensity L. This phenomenon has been analysed in this paper, which is caused by the inverse piezoelectric strain effect of the jump of space charge field during the quasi-breakdown.
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| 关 键 词： | LiNbO3：Fe：Ce晶体 光电感应 折射现象 空间转换场 |
| 收稿时间： | 2004-11-30 |
| 修稿时间： | 2004-11-302005-04-13 |
Light-induced acoustic effect in LiNbO3:Fe:Ce crystals |
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| Huang Wei,Wu Zhong-Kang and Wang Chang-Qing.Light-induced acoustic effect in LiNbO3:Fe:Ce crystals[J].Chinese Physics B,2005,14(11):2231-2234. |
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| Authors: | Huang Wei Wu Zhong-Kang and Wang Chang-Qing |
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| Institution: | Department of Basic, Beijing Institute of Civil Engineering and Architecture, Beijing 100044, China; Institute of Crystal Materials, National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China; Photonics Center, Department of Physics, Nankai University,Tianjin 300071, China |
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| Abstract: | The phenomena of acoustic emission in LiNbO3:Fe:Ce crystals have been observed in the process of light-induced quasi-breakdown. It is found that the ultra-high frequency acoustic signal introduced into the crystal is modulated by the low frequency acoustic waves. Its frequency increases with the increase of the intensity of incident light and its jump period of breakdown is the same as that of the photovoltaic current Ic, the change of light-induced refractive index \Delta n and the diffracted light intensity L. This phenomenon has been analysed in this paper, which is caused by the inverse piezoelectric strain effect of the jump of space charge field during the quasi-breakdown. |
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| Keywords: | photovoltaic current photo-refractive space charge field light induced quasi-breakdown |
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