Switching of Lasing Circular Polarizations in a (110)-VCSEL
Switching of Lasing Circular Polarizations in a (110)-VCSEL
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(110)-VCSEL 中激光圆偏振的切换
DOI：
10.1109/lpt.2009.2026631
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发表时间：
2009
影响因子：
2.6
通讯作者：
H. Kawaguchi
中科院分区：
文献类型：
--
作者：
K. Ikeda;T. Fujimoto;H. Fujino;T. Katayama;S. Koh;H. Kawaguchi
我们讨论了通过光学自旋注入获得的 (110) GaAs 基垂直腔表面发射激光器 (VCSEL) 中激光圆偏振的千兆赫兹切换的演示。 (110)-VCSEL 的自旋弛豫时间 (2.8 ns) 明显长于载流子寿命 (0.42 ns)，当两个正交圆偏振光泵浦脉冲之间的时间延迟大于 1 ns 时，它能够以高度圆偏振的正交圆偏振连续振荡。速率方程分析准确再现了测量结果。
We discuss our demonstration of gigahertz switching of lasing circular polarizations in a (110) GaAs-based vertical-cavity surface-emitting laser (VCSEL) obtained by optical spin injection. The (110)-VCSEL's significantly longer spin relaxation time (2.8 ns) than its carrier lifetime (0.42 ns) enabled it to consecutively oscillate in orthogonal circular polarizations with a high degree of circular polarization, when the time delay between two optical pump pulses with orthogonal circular polarizations was longer than 1 ns. Rate equation analysis closely reproduced the measured results.