Intensity-dependent absorption and photorefractive properties in cerium-doped BaTiO3 crystals
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- Changxi Yang
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106
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- Yuheng Zhang
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106
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- Xianmin Yi
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106
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- Pochi Yeh
- Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106
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- Yong Zhu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
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- Mengjun Hui
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
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- Xing Wu
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
説明
<jats:p>We report the optical absorption and photorefractive properties of a series of cerium-doped barium titanate crystals. The light-induced absorption and the intensity-dependent two-beam coupling gain coefficient indicate that there are at least two active trap levels in cerium-doped BaTiO3 crystals. The total effective trap density, the Debye screening wave vector, and the intensity-dependent factor increase with cerium-doping concentration as well as the pump beam intensity. The positive light-induced absorption and the negative absorption gain coefficient as the grating wave vector approaches zero indicate that the excitation cross section of shallow traps is larger than that of deep traps. One of these crystals exhibits a two-beam coupling coefficient of 8.06 cm−1 for ordinarily polarized beams, which is the highest ever reported to date. Both electro-optic index grating and absorption grating are contributing to the coupling coefficient. The response time of as-grown cerium-doped BaTiO3 with 15 ppm cerium is 220 ms at an intensity of 800 mW/cm2.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 78 (7), 4323-4330, 1995-10-01
AIP Publishing
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詳細情報 詳細情報について
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- CRID
- 1363388845283237760
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- DOI
- 10.1063/1.359836
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- ISSN
- 10897550
- 00218979
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- データソース種別
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