EXCITON TUNNELING REVEALED BY MAGNETICALLY TUNED INTERWELL COUPLING IN SEMICONDUCTOR DOUBLE-QUANTUM WELLS
EXCITON TUNNELING REVEALED BY MAGNETICALLY TUNED INTERWELL COUPLING IN SEMICONDUCTOR DOUBLE-QUANTUM WELLS
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DOI：
10.1103/physrevlett.73.2131
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发表时间：
1994-10-10
影响因子：
8.6
通讯作者：
FEUILLET, G
中科院分区：
文献类型：
--
作者：
LAWRENCE, I;HAACKE, S;FEUILLET, G
我们发现了强有力的证据，证明激子在 CdTe/CdMnTe 和 CdTe/CdZnTe 不对称双量子阱 (QW) 中作为实体进行隧道效应。外部磁场通过允许激子态之间发生共振来改变两个量子阱之间的耦合。通过磁场下的时间分辨和稳态光致发光光谱研究了隧道动力学。当空间直接激子的转移是可能的时，无论是通过 LO 声子的发射还是通过与低能 QW 的 2s 态的共振，都会发现非常有效的隧道效应。
We have found strong evidence for tunneling of excitons as an entity in CdTe/CdMnTe and CdTe/CdZnTe asymmetric double quantum wells (QWs). An external magnetic field changes the coupling between the two QWs by allowing resonances to occur between excitonic states. The tunneling dynamics are investigated by time-resolved and steady-state photoluminescence spectroscopies under magnetic field. Very efficient tunneling is found when the transfer of a spatially direct exciton is possible, either with the emission of LO phonons or via the resonance with the 2s state of the low energy QW.