| 半导体量子点中双激子的双光子共振吸收 |
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| 引用本文： | 田强,沈娇艳,杨永刚,刘国才,祝亚.半导体量子点中双激子的双光子共振吸收[J].北京师范大学学报(自然科学版),2004,40(3):338-342. |
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| 作者姓名： | 田强 沈娇艳 杨永刚 刘国才 祝亚 |
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| 作者单位： | 北京师范大学物理学系,100875,北京;铜仁师范高等专科学校,563005,铜仁,贵州 |
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| 基金项目： | 教育部高校骨干教师资助计划 |
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| 摘 要： | 从基本的非线性光学三阶极化率出发,分析半导体量子点中双激子的双光子共振吸收三阶极化率,得到2个入射频率光电场和只有1个入射频率光电场的简并情况下双光子共振吸收三阶极化率,讨论了三阶极化率的实部和虚部在双光子共振频率附近的行为,随着共振频率宽度的增大,三阶极化率的实部和虚部很快减小,三阶极化率敏感地依赖于共振频率宽度的大小.
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| 关 键 词： | 半导体量子点 双激子 三阶极化率 双光子共振吸收 |
| 修稿时间： | 2003年10月30日 |
TWO-PHOTON ABSORPTION OF THE BIEXCITON IN SEMICONDUCTOR QUANTUM DOTS |
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| Tian Qiang,Shen Jiaoyan,Yang Yonggang,Liu Guocai,Zhu Ya.TWO-PHOTON ABSORPTION OF THE BIEXCITON IN SEMICONDUCTOR QUANTUM DOTS[J].Journal of Beijing Normal University(Natural Science),2004,40(3):338-342. |
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| Authors: | Tian Qiang Shen Jiaoyan Yang Yonggang Liu Guocai Zhu Ya |
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| Institution: | Tian Qiang 1) Shen Jiaoyan 1) Yang Yonggang 1) Liu Guocai 1) Zhu Ya 2) |
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| Abstract: | Based on the basic relation of the third order susceptibility in nonlinear optics, the two photon absorption of the biexciton in semiconductor quantum dots is analyzed. The third order susceptibility in the degenerate case is presented and discussed. Sharp structures are seen at the biexciton resonance. The two photon resonance is sensitive to the off resonance value of the transition. |
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| Keywords: | semiconductor quantum dots biexciton third-order susceptibility two-photon absorption |
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