Long spin relaxation in self-assembled InAlAs quantum dots observed by heterodyne four-wave mixing
Long spin relaxation in self-assembled InAlAs quantum dots observed by heterodyne four-wave mixing
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DOI：
10.1063/1.1861978
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发表时间：
2005-02
影响因子：
4
通讯作者：
T. Watanuki;S. Adachi;H. Sasakura;S. Muto
中科院分区：
文献类型：
--
作者：
T. Watanuki;S. Adachi;H. Sasakura;S. Muto
利用共振条件下的三脉冲四波混频研究了自组装InAlAs量子点中激子的自旋弛豫。自旋光栅的概念适用于量子点，并且在10K下结合光学外差检测的测量表明，激子自旋弛豫持续长达几纳秒，并且时间常数平均是激子复合时间的2.5倍。
Exciton spin relaxation in self-assembled InAlAs quantum dots was investigated by three-pulse four-wave mixing under resonant conditions. The concept of the spin grating holds well for quantum dots and the measurements combined with optical heterodyne detection at 10K demonstrates that the exciton spin relaxation lasts up to a few nanoseconds and the time constant is ∼5 times larger than the exciton recombination time on average.