| GaAs/AlGaAs多量子阱中载流子动力学的实验研究 |
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| 引用本文： | 胡长城,叶慧琪,王刚,刘宝利.GaAs/AlGaAs多量子阱中载流子动力学的实验研究[J].物理学报,2011,60(1):17803-017803. |
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| 作者姓名： | 胡长城 叶慧琪 王刚 刘宝利 |
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| 作者单位： | (1)北京凝聚态物理国家实验室,中国科学院物理研究所固态量子信息与计算实验室,北京 100190; (2)吉林大学物理学院,长春 130021;北京凝聚态物理国家实验室,中国科学院物理研究所固态量子信息与计算实验室,北京 100190 |
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| 基金项目： | 国家自然科学基金(批准号: 10774183, 10911130356),国家重点科学研究发展计划(批准号: 2009CB930500)和财政部、中国科学院支持项目资助的课题. |
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| 摘 要： | 利用瞬态光栅激光光谱技术测量了(110)方向生长的本征GaAs/AlGaAs多量子阱的双极扩散系数.室温下,光激发的载流子浓度nex=3.4×1010/cm2时,测得双极扩散系数Da=13.0 cm2/s,载流子的寿命τR=1.9 ns.改变光激发的载流子浓度(nex关键词：
瞬态光栅
量子阱
空穴输运
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| 关 键 词： | 瞬态光栅 量子阱 空穴输运 |
| 收稿时间： | 2009-03-29 |
| 修稿时间： | 5/7/2010 12:00:00 AM |
Spatiotemporal dynamics of photogenerated carriers in GaAs/AlGaAs multiple quantum wells |
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| Hu Chang-Cheng,Ye Hui-Qi,Wang Gang,Liu Bao-Li.Spatiotemporal dynamics of photogenerated carriers in GaAs/AlGaAs multiple quantum wells[J].Acta Physica Sinica,2011,60(1):17803-017803. |
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| Authors: | Hu Chang-Cheng Ye Hui-Qi Wang Gang Liu Bao-Li |
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| Institution: | College of Physics,Jilin University,Changchun 130021,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China |
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| Abstract: | The ambipolar diffusion coefficient of (110) GaAs/AlGaAs multiple quantum wells was measured by the transient spin grating technique.The ambipolar diffusion coefficient and carrier life time,which are Da=13.0 cm2/s and τR=1.9 ns,were obtained directly by this technique under carrier concentration nex=3.4×1010/cm2 at room temperature.The measured Da keeps almost a constant value when the photoexcited carrier concentration is increased up to 1.2×1011/cm2. |
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| Keywords: | transient grating quantum well hole transport |
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