Spatially resolved and time-resolved imaging of transport of indirect excitons in high magnetic fields
Spatially resolved and time-resolved imaging of transport of indirect excitons in high magnetic fields
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DOI：
10.1103/physrevb.95.235308
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发表时间：
2017-05
影响因子：
3.7
通讯作者：
C. Dorow;M. Hasling;E. Calman;L. Butov;J. Wilkes;K. Campman;A. Gossard
中科院分区：
文献类型：
--
作者：
C. Dorow;M. Hasling;E. Calman;L. Butov;J. Wilkes;K. Campman;A. Gossard
我们提出了磁激子输运的直接测量。激子提供了实现具有几特斯拉磁场的复合玻色子的高磁场区的机会。间接激子的长寿命允许用激子光致发光的时间分辨光学成像来研究磁激子输运动力学。我们进行了空间，光谱和时间分辨光学成像的高磁场中的间接激子的运输。我们观察到，增加磁场减慢磁激子输运。的时间分辨测量的磁激子传输距离允许磁激子扩散系数的实验估计。激子光致发光能量在激光激发点的增强被发现与激子输运距离反相关。提出了间接磁激子输运的理论模型，并与实验数据相一致。
We present the direct measurements of magnetoexciton transport. Excitons give the opportunity to realize the high magnetic field regime for composite bosons with magnetic fields of a few Tesla. Long lifetimes of indirect excitons allow the study kinetics of magnetoexciton transport with time-resolved optical imaging of exciton photoluminescence. We performed spatially, spectrally, and time-resolved optical imaging of transport of indirect excitons in high magnetic fields. We observed that increasing magnetic field slows down magnetoexciton transport. The time-resolved measurements of the magnetoexciton transport distance allowed for an experimental estimation of the magnetoexciton diffusion coefficient. An enhancement of the exciton photoluminescence energy at the laser excitation spot was found to anti-correlate with the exciton transport distance. A theoretical model of indirect magnetoexciton transport is presented and is in agreement with the experimental data.