| GaAs/AlGaAs量子级联激光器中的声学声子散射 |
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| 引用本文： | 刘金龙,章小丽,王健,吕燕伍,段素青.GaAs/AlGaAs量子级联激光器中的声学声子散射[J].北方交通大学学报,2014(3):158-163. |
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| 作者姓名： | 刘金龙 章小丽 王健 吕燕伍 段素青 |
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| 作者单位： | [1]北京交通大学理学院,北京100044 [2]北京应用物理与计算数学研究所,北京100088 |
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| 基金项目： | 国家自然科学基金资助项目（60976070）;工程物理研究院基金资助项目（909） |
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| 摘 要： | 以具有三量子阱有源区的GaAs/Al0.15Ga0.85As量子级联激光器中的子带间;声学声子辐射散射为研究对象,从理论上研究了三量子阱有源区中的量子阱和势垒厚度的变化对声学声子辐射散射时间的调制作用.通过对子带间的声学声子辐射散射的总跃迁速率与相应的子带间的总自发辐射速率的比较,研究了声学声子辐射散射对量子级联激光器的辐射发光性能的影响.
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| 关 键 词： | 量子级联激光器 声学声子辐射散射速率 自发辐射速率 有源区 |
Acoustical phonon scattering in GaAs/AlGaAs quantum cascade laser |
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| LIU Jinlong,ZHANG Xiaoli,WANG Jian,LU Yanwu,DUAN Suqing.Acoustical phonon scattering in GaAs/AlGaAs quantum cascade laser[J].Journal of Northern Jiaotong University,2014(3):158-163. |
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| Authors: | LIU Jinlong ZHANG Xiaoli WANG Jian LU Yanwu DUAN Suqing |
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| Institution: | 1.School of Science, Beijing Jiaotong University, Beijing 100044, China; 2.Institute of Applied Physics and Computational Mathematics, Beijing 100088, China) |
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| Abstract: | Basing on difference method,the acoustical phonon emission scattering time in three-quantum-wells active region of GaAs/Al0.15Ga0.85As quantum cascade laser is studied.Theoretical results show how the acoustical phonon emission scattering time changes with the active region＇s structural parameters,such as the widths of quantum wells or potential barriers in the active region change.Through the ratio comparison between the total transition rate for acoustical phonon emission scattering rate and total spontaneous emission rate between subbands,the effect of acoustical phonon emission scattering on the quantum cascade laser＇s light emission is discussed. |
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| Keywords: | quantum cascade laser acoustical phonon emission scattering rate spontaneous emission rate active region |
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