Lasing Polarization Characteristics in 1.55-um Spin-Injected VCSELs
Lasing Polarization Characteristics in 1.55-um Spin-Injected VCSELs
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1.55 微米自旋注入 VCSEL 中的激光偏振特性
DOI：
10.1109/lpt.2017.2681129
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发表时间：
2017
影响因子：
2.6
通讯作者：
K. Ikeda
中科院分区：
文献类型：
--
作者：
N. Yokota;R. Takeuchi;H. Yasaka;K. Ikeda
研究了具有自旋极化电子注入 InAlGaAs 量子阱的垂直腔表面发射激光器 (VCSEL) 的圆偏振特性。在室温下，在自旋极化电子的光泵浦下，在1544 nm的激光波长下，降低双折射VCSEL获得了10%的圆偏振度。最初为了稳定激光偏振而引入的强双折射被证实对于自旋注入 VCSEL 中的高度圆偏振来说是不受欢迎的。自旋翻转速率方程分析很好地再现了实验结果并支持了我们的结论。
Circular polarization characteristics in vertical-cavity surface-emitting lasers (VCSELs) with InAlGaAs quantum wells injected by spin-polarized electrons were investigated. A degree of circular polarization of 10% was obtained in a reduced birefringence VCSEL at a lasing wavelength of 1544 nm at room temperature under optical pumping of spin-polarized electrons. Strong birefringence originally introduced to stabilize the lasing polarization was confirmed to be undesirable for a high degree of circular polarization in spin-injected VCSELs. A spin-flip rate equation analysis fairly reproduced the experimental results and supported our conclusions.