Exciton recombination processes in Cd1-xMnxSe/ZnSe quantum dots under magnetic fields
Exciton recombination processes in Cd1-xMnxSe/ZnSe quantum dots under magnetic fields
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磁场下 Cd1-xMnxSe/ZnSe 量子点的激子复合过程
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Y. Oka
中科院分区：
文献类型：
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作者：
K. Shibata;E. Nakayama;I. Souma;A. Murayama;Y. Oka
研究了Cd 1-xMnxSe量子点中激子的辐射复合和非辐射复合过程.量子点激子在零磁场（15 ps）下的短寿命是由于激子的俄歇复合将激子能量传递给量子点中的Mn 2+ d电子而引起的.在0.5W/cm 2的低功率光激发下，施加磁场，俄歇过程被抑制。在70 W/cm 2的高功率激发下，由于Mn 2+离子自旋的加热，俄歇过程在磁场中并没有减弱。
Radiative and non-radiative recombination processes of excitons were studied in quantum dots (QDs) of Cd 1-x Mn x Se, The recombination processes of excitons in the QDs were highly affected by external magnetic fields and the optical excitation power. The short lifetime of QD excitons at zero magnetic field (15 ps) was affected by the Auger recombination of the excitons by transferring the exciton energy to Mn 2+ d electrons in the QDs. The Auger process was suppressed by applying magnetic field in the low power optical excitation of 0.5 W/cm 2 . In higher power excitation of 70 W/cm 2 , the Auger process was not decreased in magnetic field due to the heating of the Mn 2+ ion spins.