| 载流子复合对时间分辨法拉第旋转光谱的影响 |
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| 引用本文： | 滕利华,王霞. 载流子复合对时间分辨法拉第旋转光谱的影响[J]. 物理学报, 2011, 60(5): 57202-057202 |
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| 作者姓名： | 滕利华 王霞 |
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| 作者单位： | 青岛科技大学数理学院,青岛 266061 |
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| 基金项目： | 国家自然科学基金(批准号:10974106),山东省杰青基金(批准号:JQ201018),山东省自然科学基金重点项目(批准号:ZR2009AZ002),青岛科技大学引进人才科研启动基金(批准号:4000022428)资助课题. |
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| 摘 要： | 利用二能级体系速率方程,推导了半导体中探测光探测到的法拉第旋转光谱的理论模型,发现电子-空穴对的复合对法拉第旋转信号随时间的衰减有重要影响,并利用该模型对GaAs量子阱中实验测得的法拉第旋转光谱进行拟合,得到GaAs量子阱材料中的电子自旋弛豫时间为73.5 ps,而直接利用单指数进行拟合得到的电子自旋弛豫时间仅为51.3 ps. 因此,直接利用单指数对法拉第旋转光谱进行拟合得到电子自旋弛豫时间的传统做法是不准确的.关键词：自旋弛豫时间时间分辨法拉第旋转光谱GaAs量子阱
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| 关 键 词： | 自旋弛豫时间 时间分辨法拉第旋转光谱 GaAs量子阱 |
| 收稿时间： | 2010-06-21 |
Effect of carrier recombination on time-resolved Faraday rotation spectroscopy in GaAs quantum wells |
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| Teng Li-Hua,Wang Xia. Effect of carrier recombination on time-resolved Faraday rotation spectroscopy in GaAs quantum wells[J]. Acta Physica Sinica, 2011, 60(5): 57202-057202 |
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| Authors: | Teng Li-Hua Wang Xia |
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| Affiliation: | School of Mathematics and Physics, Qingdao University of Scienced and Technology, Qingdao 266061 China;School of Mathematics and Physics, Qingdao University of Scienced and Technology, Qingdao 266061 China |
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| Abstract: | Based on the rate equations of a two-level system, time-resolved Faraday rotation spectroscopy model was developed. It was found that the carrier recombination has strong effect on the decay of Faraday rotation signal. The model was also used to fit the Faraday rotation spectra measured in GaAs quantum wells. The electron spin relaxation time was obtained as 73.5 ps. However, the spin relaxation time was obtained only as 51.3 ps with the single exponent to fit the Faraday rotation spectra. Thus, the conventional method with the single exponent to fit the Faraday rotation spectra is inaccurate. |
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| Keywords: | spin relaxation time time-resolved Faraday rotation spectroscopy GaAs quantum wells |
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