Birefringence controlled room-temperature picosecond spin dynamics close to the threshold of vertical-cavity surface-emitting laser devices
Birefringence controlled room-temperature picosecond spin dynamics close to the threshold of vertical-cavity surface-emitting laser devices
复制标题
双折射控制的室温皮秒自旋动力学接近垂直腔表面发射激光器件的阈值
DOI：
10.1063/1.3515855
复制
发表时间：
2010
影响因子：
4
通讯作者：
T. Ackemann
中科院分区：
文献类型：
--
作者：
M. Li;Hendrik Jahme;H. Soldát;N. Gerhardt;M. Hofmann;T. Ackemann
我们使用无自旋偏爱的电泵浦和自旋偏振光注入相结合的混合激发，分析了室温下垂直腔表面发射激光器阈值下的自旋诱导圆偏振动力学。经过短脉冲的自旋极化激发后，在弛豫振荡中观察到圆偏振度（CPD）的快速振荡。基于速率方程模型对这种行为的理论研究表明，可以通过降低激光腔的双折射来抑制 CPD 的快速振荡。
We analyze the spin-induced circular polarization dynamics at the threshold of vertical-cavity surface-emitting lasers at room-temperature using a hybrid excitation combining electrically pumping without spin preference and spin-polarized optical injection. After a short pulse of spin-polarized excitation, fast oscillations of the circular polarization degree (CPD) are observed within the relaxation oscillations. A theoretical investigation of this behavior on the basis of a rate equation model shows that these fast oscillations of CPD could be suppressed by means of a reduction of the birefringence of the laser cavity.