Carrier transport, ultrafast spin dynamics and polarisation switching in InGaAsP multiple quantum wells
Carrier transport, ultrafast spin dynamics and polarisation switching in InGaAsP multiple quantum wells
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DOI：
10.1023/a:1017507430891
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发表时间：
2001-07
影响因子：
3
通讯作者：
D. Marshall;A. Miller
中科院分区：
文献类型：
--
作者：
D. Marshall;A. Miller
利用室温InGaAsP多量子阱中的激子光学非线性来确定载流子迁移率和自旋弛豫过程。自旋弛豫的皮秒时间尺度导致通过使用圆偏振激发和线偏振探测脉冲来创建快速全光偏振开关。结果表明，开关的工作依赖于探头的圆偏振感觉。发现了一种光学诱导的双折射。
Excitonic optical nonlinearities are exploited in room temperature InGaAsP multiple quantum wells to determine the in-well carrier mobilities and spin relaxation processes. The picosecond time scale of the spin relaxation leads to the creation of a fast all-optical polarisation switch by using a circular polarised excite and a linear polarised probe pulse. It is demonstrated that the operation of the switch is dependent on the sense of circular polarisation of the probe. An optically induced birefringence is identified.